1999 Chevy Suburban Failure to start fuel issue?

Tiny
TOMCRO
  • MEMBER
  • 1999 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 124,936 MILES
On a visit to an appointment my suburban was running fine. I went inside for about 1 hour came out and the car wouldn't start. I did not hear the normal fuel pump noise when ignition was turned on and assumed it was the pump. I had the car towed home and I placed it in the garage out of the rain. The next day I went to drop the tank to replace the pump but before I did I turned on the ignition and heard the pump working and the car started. I drove it about a week without problem. I came home for lunch and the same thing happened. Convinced it was a faulty pump I pushed the car into the garage and the next day I was going to replace the pump. But it started again just fine. Now I am thinking that putting it into a dry warm garage is affecting some electrical component, computer or module. I can't see how it could affect the pump itself. I want to be sure before I go to the trouble and expense of replacing the pump. Any help is appreciated.
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Sunday, February 3rd, 2008 AT 11:26 AM

8 Replies

Tiny
BLACKOP555
  • EXPERT
Have you noticed the temperature cold on the days it has problems?

Post back what you find.
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Sunday, February 3rd, 2008 AT 1:55 PM
Tiny
TOMCRO
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Yes the 1st time we experienced a really cold couple of weeks (in the low 20's) the second time it was in the 30's. Both times it was really wet outside also.
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Sunday, February 3rd, 2008 AT 5:01 PM
Tiny
BLACKOP555
  • EXPERT
Ok, this will be a fun one to diagnoss. First we will suspect a cold start issue. Change the coolant temperature sensor, clean the throttle body. Well go from there, let me know how it goes.
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Sunday, February 3rd, 2008 AT 6:36 PM
Tiny
TOMCRO
  • MEMBER
No its not a cold start issue, the fuel pump is not working at the time specified. Under normal operation when the key is turned on you can here the fuel pump come on for a few seconds. Both times that the car did not start the fuel pump did not come on and there was no fuel to the engine. That is why I thought it was a fuel pump. However after pushing it into the garage and leaving it overnight the fuel pump would activate and it would start. This happened twice, the 1st time we drove it for a week before it failed a second time. I have replaced the fuel pump relay thinking it may be an electrical issue. But that did not help.
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Sunday, February 3rd, 2008 AT 9:18 PM
Tiny
NOTME
  • MEMBER
This is not a fix, but something that can get you going in a pinch. Next time it happens, jump up and down on the rear bumper. This has happened to me numerious times and the problem can not be located as it is not throwing any codes. Hey, at least it isn't duck tape and baling wire. :)
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Monday, February 4th, 2008 AT 8:30 AM
Tiny
BLACKOP555
  • EXPERT
Sounds to me like you need a dealer pump, make sure it has the proper amount of comm. Bars in the pump, if not it will go good for a few months then go out.
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Monday, February 4th, 2008 AT 9:05 AM
Tiny
TOMCRO
  • MEMBER
Thanks, did you ever find out the problem?
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Monday, February 4th, 2008 AT 9:32 AM
Tiny
NOTME
  • MEMBER
If this question is directed to me. No. My problem is, it will start and then die. Like it is needing more fuel, but I could here the fuel pump priming each time I tried to restart. Once after sitting for two days (weekend) it started. Twice I have had it towed to a mechanic and it started after it was dropped from the wrecker. After that, I started bouncing on the rear bumper when it happens.
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Tuesday, February 5th, 2008 AT 9:36 AM

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