Chevy 350 Tbi Wont Start Has Spark And Fuel

i disassembled injector body cleaned replaced all o-rings truck ran great but had to feed fuel in trottle body to get running afterwards fire run everytime why i stumped. also make sure the ignition system is all good wires, cap, rotor, coil. had a 94 305 TBI which on the odd occasion would start running rough, did the same cap rotor swap still ran rough, checked codes, reset timing, finally by fluke I noticed one of the vaccum hoses came off of the egr valve (Not sure if its a valve as it was a plastic box on the passenger side of manifold next to TB), plugged it back in nice idle, same condition would happen every month or so I. and have power at injector fuse ,no pre start fuel - Answered by a verified Chevy Mechanic. It has new computer, new module. Engine will crank and run if you pour gas in the throttle body. Have a helper try to start the car while you watch the spark plug for a spark. I have a 1990 Caprice Classic with the TBI 305. I have a 1988 Chevy 350 TBI K1500 truck and need to know could a defective ECM cause it to have no spark. I checked all fuse box fuses. 1995 Chevy K1500 350 TBI Motor Replacement issues was created by husker240 I have currently having an issue with the 1995 Chevy K1500 truck. I replaced the starter and it started up and ran for about 2 mins. Hello,I have a 1987 Chevy 1 ton work truck that has 350 TBI and i am having problems,over the year when i would crank it up and go down the road it would surge alittle but would clear up i a minute or so,well this morning i went to crank it up it cranked fine but started surging up and down and gets worse,when i try to give it gas it will die,but it will crank back up but as it trys to warm up. Quality of Construction This harness is constructed using OEM quality wire for superior reliability and long term use. The LT1 and the car are now gone, but I've left all the information!! Included on this page is the VATS page, showing how to bypass GM's anti-theft system used in many early 90's vehicles. I change the coil if I have a GM engine that won't start in the cold and has no spark. then check basics, your ground for the fuel injection, the power for it must be hot in crank and run, the fuel pump must be powered in both run and crank and so on. It won't idle on its own, you have to step on the gas to keep it going. 1994 chevy pick up, 2wheel drive, 1500 series. motor will crank, and plugs get spark but wont turn over or. Re: Chevy 350 (jet boat) wont start ok guys, im at a loss now. Truck will not start unles i spray starter fluid. You start it, drive it, shut it off and it won't start again for like 45 min. I'm having starting trouble also but only when it's real cold. The production years of the engine were 1962-1986 with a horsepower of 350hp @ 4500 rpm. I have unplugged tps to see if in flood mode, no pulse. ???i have an 87 tbi that up and quit the other day it backfired once or twice then quit i figured it was the fuel pump as it would not start off the key but prime it and it would run until it burnt the prime i changed the pump the brand new pump wouldnt run put another in it now it pumps fuel but truck still will not run it has pressure up to the tbi i checked that the injectors have fire i. I think I've tried just about everything I can think of. I apparently have a good ECM, new ignition module and coil, good spark, good compression, good injectors, good fuel pressure, and yet my engine wont start. In this video you can hear the engine cranking but it will not start. I have no spark and no fuel. For some reason these motors wear out the distributor cap and rotor quickly, we tried all kinds of fuel solutions when it wouldnt start but as soon as we changed the cap and rotor it fired right up,I have done it twice now in 4 years. 7/350 TBI engine from a 94 Suburban. Well, it takes 3 things for an engine to run: Compression Air/Fuel mixture Spark. Doesn't sound the sam 1990 chevy 1500 Turns over has spark and fuel but won't start - 1990 Chevrolet C1500. 1991 chevy 3500 w 454. if u need more info just ask. 7 350 tbi wont start it has 93k miles, its getting fuel into the injectors, my injectors are working, fuel pump is working, fuel pump relay, fuel injectors, fuel filter and pump are all new, now to the ignition side the distributor is new, coil is new, ignition module, fuses,pick up coil, cap and rotor are new, wires and plugs are new, timing was set, so i. I have a 1990 Chevy truck with a 5. I don't have a compression gauge, so that's why I don't have a reading, but I'll get it measured as soon as I can. 3 have fuel pressure Spark and it still will not start does anybody know a few tricks 6-19-2017 Can't figure out why this won't start 4. Sorry but this is going to be a long one! Short version: Truck died and won't restart. It wants to start but once i let go of the key it wont stay on so it shots on but the continuity just isn't there could it be the distributor cap?. Fuel pump is buzzing and after a cranking for a while you can smell gas from the exhaust pipe. would that effect it not spraying fuel. We are getting fuel from the fuel pump because the relay clicks, and the fuel pump spins up. I can dump gas down the intake and it still will not start. Everything was fine until one morning it just wouldn't start. On the no spark issue, we've replaced the ignition module that sits. Grant Walker. if it still is lacking start what does the spark look like when cranking ? if no spark could be a spark module. 1989 chevy 1/2 ton wont start. Is it the fuel pump, fuel filter, or what. i have fuel in lines to trottle body injector assembly full fuel got fire at plugs as i said replaced intake but all went back together no problem drove for three days parked for a few went start would not run but cranked. Engine will crank and run if you pour gas in the throttle body. I have recently replaced the fuel filter, air filter, and fuel pressure regulator in attempt to fix this problem. Fuel injectoion won't even blink at. 7 in my wifes liberty gets 15 around town with the fuel injection I'm contemplating putting a 4. The pump kicks on when you hit the key, working, and sending fuel to the TBI when lines are disconnected to check it. Find out the answer here on HotRod. I have a 1996 Chevy Caprice 4. and it has no spark. There are two types of accessories available to you on this site. When motor runs it will die but the fuel pressure is at 10-12 psi until … read more. I have a 1990 Chevy truck with a 5. My fiancé’ bought a 1994 Chevy 3/4 ton 4×4, 5. Check for fuel pump operation and power at the injector, each has two wires, one is ground, the other will be hot when the key is on. 1993 chevy k1500 350/5. I bought a tracker with problems from a guy last week. First noticed no fuel out injectors when cranking, checked for bad fuel pump, by sparying starter fluid in the TBI, didn't work. Re: 1999 Chevy Express Van - Will Not Start: H: 8-18-11 : I have a 2000 chevy Express and I bet some of you are having the same problem I had. Vehicle Won't Start or Engine Noises. It is a 1991 Suburban with 350 TBI. ran great when i turned it off. 1987 TBI wont start, no spark, but has fuel Discussion in 'TBI 350. CEL came on but father in law doesn’t have a scanner to check and I’m 2 hrs away. So I do have a 4runner 1997, 4cyl and 2. If you have all 3 it should run. I got it put together and it won't start. 350 TBI won't start when timing bypass is disconnected / unplugged was created by Napy134 Hey guys, I'm new to this forum and new to owning my first chevy truck (with a small problem - hopefully!) and I wanted to post this here for some help/advice/guidance. The injectors are pumpimg gas so it cant be the fuel pump, I think. I don't know if a failed sensor would still give a spark at all or spark at the wrong time. SOURCE: 90 chevy k1500 350 tbi fuel problem starts but wont stay running try bypassing the oil pressure switch on the back of the block behind the distributor, if there oil pressure switch goes bad it will do this. Does anyone have detailed wiring schematics or diagrams for a 93 TBI 350? I believe the motor came out of a 2WD pickup with the 4L80E. 95 chevy 350 no spark C/K Car Forums. 7L Chevrolet truck. If they are fouled or worn, replace them and retry. The current problem I have is that the engine won’t start. Engines covered: Pre-Optispark small block Chevy V8s with TPI or TBI injection and HEI ignition with electronic spark timing (seven or eight pin HEI module) Much of this article will apply to other 1980s era GM cars including injected big blocks and even fire V6s. I have checked all the firewall fuseable links. He said its like it ran out of gas. I don't have any fuel pressure on the fuel rail. I have TBI as well and lemme tell ya, its WEIRD. I have a 97 chevy silverado, 350, turns over but won't start. I don't have a compression gauge, so that's why I don't have a reading, but I'll get it measured as soon as I can. motor will crank, and plugs get spark but wont turn over or. Everything was fine until one morning it just wouldn't start. 1993 Chevy 350 5. If you don't have any codes set, you should be fairly certain that your electrical part of the fuel and emission systems are good. I found out, the cap and rotor were dry, the plugs were getting a spark, fuel was flowing all the way to the throttle body (TB), but not getting past the TB. the sender on the back behind the intake manifold is also a switch for the fuel pump I have two go bad 1 would not let the truck start and the other the fuel pump would run continuosly when you shut the engine off the exact wiring I am not sure of but I know it controls the fuel pump. For some scan tools enter VIN 10th "L" 3rd "C" 8th "K". The GM TBI (Throttle Body Injection) system uses a pair of low pressure fuel injectors mounted above the throttle body opening. now this truck worked fine just a half hour ago, and everything was normal. The Cross Fire Injection albeit as short lived as it was, was considered to be "cutting edge" when it was introduced in the fall of 1981 for the 1982 model years. I've taken the time to summarize the information provided in the workshop manual. Most screws have a T25 torx head, but they also can be an allen head screw. And just a regular hei distributor. The engine seemed to run fine while driving. 7l that will not start. Distributer is set facing the number ones so im out of ideas of why it wont start. 0L V8 - Turns over but won't start its fuel or spark. We have fire The injectors 87 TBI K5 won't runI'm stumped. 7 won't start, but turns over fine,has spark and is getting fuel. I bought a tracker with problems from a guy last week. For some scan tools enter VIN 10th "L" 3rd "C" 8th "K". I have a 1989 chevy 350 tbi that will not start when hot. GM TBI WIRING GM Truck Throttle Body Injection 4. Hooked it up to a pc reader and no signal sent from the truck to the unit. Up to 230hp engines that air flow is fine. 7/350 TBI engine from a 94 Suburban. I've replaced the fuel filter. After it starts it runs great. Replaced distributer cap, ignition control modual, new plugs and wires, new engine colant temp sensor, new fuel filter new fuel pressure regulator i rebuilt the tbi. Has a 650 holley 4 barrel that is freshly rebuilt. Doesn't sound the sam 1990 chevy 1500 Turns over has spark and fuel but won't start - 1990 Chevrolet C1500. A hardened diaphragm might be causing the fuel pressure that has been lessened by the fuel pressure regulator to not increase as rapidly as it must and you won't get the appropriate fuel quantity in spite of lengthened injector duration. Unlike a port fuel injection system, that sprays fuel into the intake manifold runner just above the intake valve, the injectors in this system spray fuel directly into the throttle body. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse. and have power at injector fuse ,no pre start fuel - Answered by a verified Chevy Mechanic. Fuel pump is buzzing and after a cranking for a while you can smell gas from the exhaust pipe. Few days later it would start after it stalled then chug all the way home. 454 chevy engine in motorhome after sitting for about 5 month I started it up and I got a message reduced powwer the motorhome would only go about 5 mph. The GM TBI (Throttle Body Injection) system uses a pair of low pressure fuel injectors mounted above the throttle body opening. I don't have any fuel pressure on the fuel rail. Quiet and long lasting, but weak fuel delivery. I wasn't able to install Howell's TBI fuel injection system on the '79 because. do you think this is a vaccum issue. Checked fuel pressure and regulator. So that leaves spark, or fuel. I wondered if anyone could help me with a question that I can not seem to get a answer to. I have tested all the spark plugs and the ignition coil and all of them are producing a spark. We have fire The injectors 87 TBI K5 won't runI'm stumped. Put an end to cold start issues, hesitations, vapor lock, and. 1990 Chevy Silverado - engine turns over, but won't start - I've checked the obvious OK, so I bought a 1990 Chevy Silverado with a 5. I have a 93 K1500 TBI 350 and it has no spark at all. It's cheap and I worry about. I have a chevrolet 1989 C3500 with a 7. 200 Million used auto parts instantly searchable. Chevy 350 TBI out of a 92 Chevy 1500 pickup (was a crate motor) Driving last week, and it stalled and can't get it started noticed coil wire disconnected from distributor, plugged back in, truck turns over, just won't start First checked to see if I was getting fuel, pump kicks on and fills the bowl. Tbi fueling, fuel pump pumps only with key in start, new rotor, cap. Just bought a new engine from JEGS because the old one would not start and had over 300k miles on it :). 1995 Chevy Truck V8 Four Wheel Drive Automatic a lot miles I have a 1993 Mark III Chevy 1500 and I love it. 87 chevy truck (r20) 350 tbi. Troubleshooting Guide for Hard Starting Problems. Genuine Chevrolet, Buick, GMC and Cadillac Accessories are the only accessories backed by GM. After these repai. 99) but I use my timing light to see if I'm getting spark (might have to get the Lisle tool). Unlike a port fuel injection system, that sprays fuel into the intake manifold runner just above the intake valve, the injectors in this system spray fuel directly into the throttle body. Click here to start. More than 448,000 owners were asked to rate the quality of their vehicles. Fuel pump is buzzing and after a cranking for a while you can smell gas from the exhaust pipe. Why should an engine that has everything right still refuse to start. If there is a spark, remove and check the spark plugs. it carnks over but will not start up. my 94 chevy 4x4 1500 5. I have replaced every sensor possible on the motor. Starting at the tank the fuel pump is a turbine pump. Page 2- 1988 Silverado 350 TBI Dies When Hot Chevy Silverado Forum the truck still has sparkdoes it just throw the timing off?? it won't let the. I now have spark, fuel and compression but the truck won't start? I have had the alternator tested and it passed with no problems, the battery checks out and is good. What am I missing other that pulling the injectors and or rebuilding the TBI?. Anything over that 350hp, I'd recommend switching to an Edelbrock replacement TBI or a modern TBI, like the FAST system. I wasn't able to install Howell's TBI fuel injection system on the '79 because. It has new computer, new module. 1995 Chevy K1500 350 TBI Motor Replacement issues was created by husker240 I have currently having an issue with the 1995 Chevy K1500 truck. Also replaced the cap and rotor. There are many reasons why an engine won't start. Vehicle Won't Start or Engine Noises. Have 1990 chevy cheyenne 350 tbi wont start has fuel no spark will work fine for a few days and then it wont start !! after it sits for a few days it starts right up !! new coil n o2 sensorwont start the ignition mogule is prpbably bad. ran great when i turned it off. TBI - With the air cleaner off, I can see both injectors spraying fuel and you can see it landing on the throttle blades before being sucked in. 350 no spark, no fuel, cranks fine will not start. Is the coolant temperature sensor only used in closed-loop operation? Reading the initial problem, I was going to question the O2 sensor, since I know that gets brought in once the engine temperature comes up and the computer swtiches to closed loop operation. Then it fires right up and do it all over again. I have the Harbor Fieght fuel pressure gauge you show (got it last Christmas on sale for $9. No lights, not power, no nothing except the alarm when the key is in the switch. I have changed the cap, rotor, throttle body, ignition module, egr valve, plugs, wires, checked fule pump, and filter. '98 Chevy 1500 5. OK guys, I am out of ideas here on this truck. 1993 Chevy 350 5. Once it runs for a while and gets warm it will start right up. With throttle body servicing put a new fuel pressure regulator in. Read all about this Chevy 350 small block as we convert it to a throttle body injection from a carburetor. and have power at injector fuse ,no pre start fuel - Answered by a verified Chevy Mechanic. And over the last four years, Chevy rose to the top across cars, trucks and SUVs. 88 Silverado, no start unless primed with fuel. i have set the timing at 0 degrees (bypass wire unplugged) and when i plug the bypass back in the computer advances the timing to like 20-30 degrees at idle. Max-Fire® Ultra-Spark® performance spark plug wires are manufactured from highest quality materials to help deliver maximum voltage - ensuring the ultimate performance. i had that problem about 6 months ago. Remove air cleaner from TBI. If you have cmfi fuel injection, my info says 55--61 psi. Put a long block in his dads old Chevy truck and he was lost as hell. 7 engine that don't want to starts. 350 TBI won't start when timing bypass is. Where to Buy the TBI Fuel Pressure Gauge Adapter. How to Clean a Chevy TBI Fuel Injuctor by Troy Lambert A throttle body injection, or TBI, acts almost like a carburetor, except that instead of relying on jets and vacuum to regulate the amount of fuel entering the intake, a fuel injector, or sometimes two, is used to deliver the correct amount of fuel to the engine. I haven't checked anything yet, but if a 93 TBI 350 won't spray any fuel (it has spark and fuel preasure and starts up on starting fluid) is there anything other than the throttel pos. Given the age I'd suspect fuel pump or fuel pressure regulator. 0 has fuel, compression and spark but won't start Type of motor, year, serial number all help. - engine cranks but will not start unless fuel is poured directly into TBI unit-then engine starts hard but stalls when this little fuel is used up - fuel pump tested ok- fuel filter ok - fuel in gas line ok - TBI sprays a little gas when key turned to start but not enough to start engine and no fuel there after when I can get engine. All engines in the model year should be TBI so you can do the test outlined below, looking for the fuel spray. Many still out there with TBI vehicles needing help getting more modern power levels and fuel mileage from older GM throttle body injected vehicles without going to the process of rewiring the vehicle to run a more modern fuel injection system. 7L 350 TBI Engine. This is a discussion on 98 chevy 2500 wont start within the Automotive Support forums, part of the Tech Support Forum category. - Hi all new to this fine forum. There are many reasons why an engine won't start. 5 TBI costs about $12. Hey everyone, I have a 1996 Chevy C1500 with a 5. I have a 1995 chevy p30 18' box truck with a 7. So over the long haul, driving a Chevy is a quality decision. "1994 Mastercraft 190 Prostar Indmar 350 V8 TBI No fuel prime when trying to start after skiing sometime 2-3% of the time? New fuel pump last year, new fuel filters, runs great 98% of the time start right away the first time. I have a 97 chevy silverado, 350, turns over but won't start. 1989 chevy 1/2 ton wont start. 1993 Chevy 350 5. Even though you have fuel visibly coming out of the throttle body does not mean you have enough fuel PRESSURE to start the engine. The third time, it began turning over as usual, just no start. I have fuel out of injectors, power to the coil. If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. I have checked with a noid light, no pulse. The Chevy 305 small block has got to be the Rodney Dangerfield of SBC engines. next thing i would say to do is if your spark plugs are new drive it for 20 or 30 miles and pull a couple out. would that effect it not spraying fuel. I have an idea, but I'd like to poll the group. I have a 1988 Chevy Silverado with a 350 V8 TBI engine. 7 350 tbi wont start it has 93k miles, its getting fuel into the injectors, my injectors are working, fuel pump is working, fuel pump relay, fuel injectors, fuel filter and pump are all new, now to the ignition side the distributor is new, coil is new, ignition module, fuses,pick up coil, cap and rotor are new, wires and plugs are new, timing was set, so i. My 83 350 will not start but have checked all the plugs for spark and checks good. When I used 5w30 in my 350 TBI - it had low oil pressure after long idle (10+ minutes). had a 94 305 TBI which on the odd occasion would start running rough, did the same cap rotor swap still ran rough, checked codes, reset timing, finally by fluke I noticed one of the vaccum hoses came off of the egr valve (Not sure if its a valve as it was a plastic box on the passenger side of manifold next to TB), plugged it back in nice idle, same condition would happen every month or so I. If I take the core out of the fuel rail where you hook up the pressure tester at it will shoot fuel out, put it back in and still no fuel pressure. Here are some observations I have made: *Has spark, but very weak *ECM does not show CEL. Went to get gas and took a while to start (a few minutes), drove home and no performance issues on trip home and parked at home but now won't start since. I have 1988 Chevy 350 TBI. For some reason these motors wear out the distributor cap and rotor quickly, we tried all kinds of fuel solutions when it wouldnt start but as soon as we changed the cap and rotor it fired right up,I have done it twice now in 4 years. How to Clean a Chevy TBI Fuel Injuctor by Troy Lambert A throttle body injection, or TBI, acts almost like a carburetor, except that instead of relying on jets and vacuum to regulate the amount of fuel entering the intake, a fuel injector, or sometimes two, is used to deliver the correct amount of fuel to the engine. TBI - How to: 305 To 350 swapeverything you need to know - Ok, my head just exploded from the bajillion’th 305 to 350 swap question. 7L Vortec, I got the truck recently and was told it just needed a Fuel pump, I replaced the Fuel pump, and the Filter, also the pump turns on and there. Check for fuel pump operation and power at the injector, each has two wires, one is ground, the other will be hot when the key is on. on a 95 Chevy Tahoe Silverado that Won't Start. Then we'll progress to altering the timing and fuel curves, to get better throttle response, torque, and even MPG! Click Free Tips to see what I have so far! Much of it can be. The switch has been bad at times when attempting to start but the truck would always start. Have not yet checked fuel pressure. Have 1990 chevy cheyenne 350 tbi wont start has fuel no spark will work fine for a few days and then it wont start !! after it sits for a few days it starts right up !! new coil n o2 sensorwont start. I don't know if a failed sensor would still give a spark at all or spark at the wrong time. I took fuel line off at filter and was testing flow when it seemed to fire up and run for a few seconds. 3l tbi s10 rotates but wont start. 7/350 TBI engine from a 94 Suburban. The crank sensor would only need replacing if it has no spark and a code for it. the EGR might be a cause but the gasket between TBI and intake is know to fail with age, Also nrmal fuel presue from pump is about 12 to 14 PSI and pressure after regulaotr is 9. no spark, no fuel, injectors don't fire, confirmed. Engines covered: Pre-Optispark small block Chevy V8s with TPI or TBI injection and HEI ignition with electronic spark timing (seven or eight pin HEI module) Much of this article will apply to other 1980s era GM cars including injected big blocks and even fire V6s. But if it starts cold and runs fine and wont start up hot isnt a plug so scratch that. ? - Check if you have spark coming to each cylinder. Fuel pump was replaced two years ago (with only 10k to 12k). If your Chevrolet Silverado is experiencing issues with its ignition system, you may need to do some troubleshooting to determine the cause. hello all, long time watcher, first time asker lol. A Chevy '89 Suburban With A 350 5. It wants to start but once i let go of the key it wont stay on so it shots on but the continuity just isn't there could it be the distributor cap?. has good spark getting fuel to tbi if anything possibly too much fuel??. You should hear them clicking. now this truck worked fine just a half hour ago, and everything was normal. He changed the fuel pump and filter. 95 chevy 350 no spark C/K Car Forums. Order the part with stock number in hand. Truck will not start unles i spray starter fluid. When i first start the truck it slowly rises from 1000 to 1500 rpm then comes down after five minutes to 1000 rpm then when i drive it for a few minutes then it starts idling at 1100 rpm when the truck is in drive. I have tested all the spark plugs and the ignition coil and all of them are producing a spark. I've checked the module, checked the pickup coil, checked the coil itself and can't figure it out. Your ignition system contains many components, such as spark plugs, ignition coils, and fuel injectors, all of which work in tandem to initially start your engine. Engines covered: Pre-Optispark small block Chevy V8s with TPI or TBI injection and HEI ignition with electronic spark timing (seven or eight pin HEI module) Much of this article will apply to other 1980s era GM cars including injected big blocks and even fire V6s. 2500 Pick up with a 5. After it starts it runs great. On the no spark issue, we've replaced the ignition module that sits. It is a mystery to me, but ignition coil MAY be bad if you can trust a multimeter to measure as low a 0. 1990 tbi 350 runs ok for a sort time then runs rough then dies. Moved up to 10w30 and thicker, no low oil pressure issues ever since. 60 Answers-completely stock V8 Vortek - Automatic -no codes -all plugs are getting spark, AFTER replacing ignition coil -checked 3/8 plugs, no fouling (they're a bitch to get to with my limited tools - assumed. However, in cold weather if you dont know the age of your spark plugs, they will fail causing your engine to flood very easily. Initially, I thought the fuel pump was bad because it didn't seem to be making the noise I recognized when turning the key to 'on'. Plenty of gas was coming out. I have a 1989 chevy 350 tbi that will not start when hot. I have a 1991 Chevy S10 pickup that won't start. 96 Chevy C1500 5. Mechanic said it was the fuel pump so he changed it and $850 later it still won't start. not sure tho. Here is the problem, I have replaced the fuel filter, fuel pump and fuel pump relay. i have a 95 Chevy suburban with the 350 tbi motor and am having some issues with the timing. Silverado & Fullsize Pick-ups - 90 chevy 350 5. So that leaves spark, or fuel. com or in the April 2013 issue of Hot. QUESTION: 1998 Silverado 350 Vortec won't start when its cold. '98 Chevy 1500 5. i have fuel in lines to trottle body injector assembly full fuel got fire at plugs as i said replaced intake but all went back together no problem drove for three days parked for a few went start would not run but cranked. longer than any other attempt. I tried oreilly & napa to test the ign. I believe I stopped it pinking by temporarily running an IV line into a vacuum hose some years ago but, as has been pointed out above, the delivery pattern with that is the wrong way round. 3 TBI , best gas mileage I've seen in a long time getting almost 26mpg around town in my 3b everything else I own gets around 13-16 if I'm lucky the 3. I have replaced pickup coil in distributor, no pulse. GM TBI on an AMC 360/401 motor FAQ. Never was able to check codes, so I dont know. The engine seemed to run fine while driving. i just changed my fuel filter, injector and did a tune up on it what can it be. After it starts it runs great. Genuine Chevrolet, Buick, GMC and Cadillac Accessories are the only accessories backed by GM. Now won't start. Flat cap, with spark plug wires on the ends. Do you have spark, if so check the timing with the timing adjustment wire disconnected (brown wire). Just recently it stalled out one day and has had issues ever since. Another fuel system was introduced in 1992 called Central Port Injection (CPI) and appeared first on the 4. I apparently have a good ECM, new ignition module and coil, good spark, good compression, good injectors, good fuel pressure, and yet my engine wont start. I went to go start it today and it just cranks, plenty of fuel squirting into the cylinders of the TBI and i checked for spark, there is spark so i decided to change my plugs with new ones. I have a 93 K1500 TBI 350 and it has no spark at all. Here are some observations I have made: *Has spark, but very weak *ECM does not show CEL. 2500 Pick up with a 5. From Carb to EFI on just a fistful of dollars… Updated 3/3/09 – Added dyno chart showing comparison of readings taken on old vs new dyno. Got fuel and spark but no start. Chevy 350 turns over but it will not start. First noticed no fuel out injectors when cranking, checked for bad fuel pump, by sparying starter fluid in the TBI, didn't work. If you don't have any codes set, you should be fairly certain that your electrical part of the fuel and emission systems are good. Intermittant problem starting. I have a 1991 Chevy S10 pickup that won't start. 7l Chevy C1500* - $25. I have replaced fuel pump, fuel pump relay under hood, checked fuses, replaced module in distributor cap. If he is sure he has proper fuel pressure, the next thing to do is check for spark at each spark plug. hello all, long time watcher, first time asker lol. In this video you can hear the engine cranking but it will not start. check fuel pressure at rail. [ARCHIVED THREAD] - 1991 Chevy 1500, 350 tbi won't start. So I’m going to compile some info here and just post a link from now on. has good spark getting fuel to tbi if anything possibly too much fuel??. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse. Even though you have fuel visibly coming out of the throttle body does not mean you have enough fuel PRESSURE to start the engine. 7L Vortec, I got the truck recently and was told it just needed a Fuel pump, I replaced the Fuel pump, and the Filter, also the pump turns on and there. The third time, it began turning over as usual, just no start. It takes sometimes 10-15 times of starting and running then shutting down before it will stay running. fuel pressure stays at 10-12 psi with koeo for 2 seconds. I don't have a compression gauge, so that's why I don't have a reading, but I'll get it measured as soon as I can. My 1999 Chevy Silverado cranks but is hard to start and has a check engine light with a cylinder misfire code. injectors appear to spray a good cone shape. The injectors are not firing. please help before I loose it and send this burb to an early grave. it is a GMC '89 chevy 1500. banging or knocking), it is easiest to first check for spark (ignition) and fuel. 1993 chevy k1500 350/5. If the engine is not making noise (i. I wondered if anyone could help me with a question that I can not seem to get a answer to. If your tpi is equipped with a cold start injector, the cold start switch is activated to enrich the fuel to help start the engine. i checked to see if its getting fuel and spark and. The third time, it began turning over as usual, just no start. I have a 1964 impala that I swapped out the drive train out of a 1992 1500 chevy truck. SOURCE: 90 chevy k1500 350 tbi fuel problem starts but wont stay running try bypassing the oil pressure switch on the back of the block behind the distributor, if there oil pressure switch goes bad it will do this. TBI - How to: 305 To 350 swapeverything you need to know - Ok, my head just exploded from the bajillion’th 305 to 350 swap question. 7 350 tbi wont start it has 93k miles, its getting fuel into the injectors, my injectors are working, fuel pump is working, fuel pump relay, fuel injectors, fuel filter and pump are all new, now to the ignition side the distributor is new, coil is new, ignition module, fuses,pick up coil, cap and rotor are new, wires and plugs are new, timing was set, so i. The TBI system is really quite simple. not sure tho.