1989 chevy truck won't start

woodman13 · 07-04-2006, 03:28 PM

I have a 1989 chevy truck with a 350 TBI that won't start. It turns over fine and you hear the fuel pump hum, but it won't start. If you dump a small amount of gas in the TBI housing it will start and run fine. The minute you turn the ignition switch off and try to restart it it will not start. The truck has 150K miles on it and it has been well maintained. The problem started a few times here and there and now does it all the time. I have installed a fuel pump and strainer, I rebuilt the TBI and installed a new AIC. I have checked all the fuses and think it is something to do with the injector signal at start up, but I can not find anything on it in my crappy haynes repair manual. Any help would be great.

chevyguy · 07-04-2006, 11:43 PM

sounds like low fuel pressure to me. Have you checked the fuel pressure, Should be between 13-9 psi any lower and it fuel pump time

1995C3500 · 07-05-2006, 05:14 AM

a 1992 at work had the same problem last year, it came down to that it needed a new filter, and the lines had to have water pressured through them cause a ton of dirt was in the lines and clogging it and until the engine was started it wasnt pulling enough fuel to run, it would sputter and spit but not do more than fail to start till we sprayed starter fluid down the tbi

88chev · 07-07-2006, 07:52 PM

are you getting fuel at the throttle body?

Hayden · 07-10-2006, 07:34 PM

It's junk. wanna sell it? lol

woodman13 · 07-13-2006, 06:01 AM

It was the ignition modual. I never could find it in my repair manual. I found it on here and just replaced the part. It runs great now, ready for another 150K miles.

07-04-2006, 03:28 PM	#1
woodman13 Junior Member Join Date: Jul 2006 Posts: 3	1989 chevy truck won't start I have a 1989 chevy truck with a 350 TBI that won't start. It turns over fine and you hear the fuel pump hum, but it won't start. If you dump a small amount of gas in the TBI housing it will start and run fine. The minute you turn the ignition switch off and try to restart it it will not start. The truck has 150K miles on it and it has been well maintained. The problem started a few times here and there and now does it all the time. I have installed a fuel pump and strainer, I rebuilt the TBI and installed a new AIC. I have checked all the fuses and think it is something to do with the injector signal at start up, but I can not find anything on it in my crappy haynes repair manual. Any help would be great.

07-04-2006, 11:43 PM	#2
chevyguy Senior Member Join Date: Sep 2005 Location: ALABAMA Posts: 3,160	sounds like low fuel pressure to me. Have you checked the fuel pressure, Should be between 13-9 psi any lower and it fuel pump time __________________ When i die, i dont want to walk gracefully thu the pearly gates and turn in a unused body. i want to go sliding thru sideways and turn in a body that has been completely used up.

07-10-2006, 07:34 PM	#5
Hayden Senior Member Join Date: May 2006 Location: Bay City,Michigan Posts: 365	It's junk. wanna sell it? lol __________________ There Is No Replacement For Displacement

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07-05-2006, 05:14 AM	#3
1995C3500 Full Member Join Date: May 2006 Location: Cincinnati Posts: 39	a 1992 at work had the same problem last year, it came down to that it needed a new filter, and the lines had to have water pressured through them cause a ton of dirt was in the lines and clogging it and until the engine was started it wasnt pulling enough fuel to run, it would sputter and spit but not do more than fail to start till we sprayed starter fluid down the tbi

07-07-2006, 07:52 PM	#4
88chev Full Member Join Date: May 2006 Posts: 35	are you getting fuel at the throttle body?

07-13-2006, 06:01 AM	#6
woodman13 Junior Member Join Date: Jul 2006 Posts: 3	It was the ignition modual. I never could find it in my repair manual. I found it on here and just replaced the part. It runs great now, ready for another 150K miles.