1998 Chevy Tahoe not firing

Tiny
JZ2424
  • MEMBER
  • 1998 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 181,023 MILES
I have replaced the engine 1 year ago. I have all of the sudden I am not able to get it to start. I have fuel pressure and the fuel pump is 2 years old. New batt and alt also starter is new. Why will it not start or fire
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Thursday, September 2nd, 2010 AT 1:52 PM

9 Replies

Tiny
WRENCHTECH
  • EXPERT
What is the fuel pressure?
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Thursday, September 2nd, 2010 AT 1:59 PM
Tiny
JZ2424
  • MEMBER
15 psi
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Thursday, September 2nd, 2010 AT 2:00 PM
Tiny
WRENCHTECH
  • EXPERT
There's your problem. This engine requires at least 55PSI to even run.
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Thursday, September 2nd, 2010 AT 2:12 PM
Tiny
DWB812
  • MEMBER
Before you drop your tank and replace your fuel pump try replacing your fuel filter. It could be clogged and not allowing the pressure to the fuel rail. It's inexpensive and might save you a real headache.
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Thursday, September 2nd, 2010 AT 5:57 PM
Tiny
WRENCHTECH
  • EXPERT
This vehicle uses a high flow, pass through type filter which cannot be the sole cause of a no start condition by itself. A restriction in the filter will lead to a fuel pump failure and for that reason should always be changed with the pump but will not cause a "no start"
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Thursday, September 2nd, 2010 AT 6:07 PM
Tiny
DWB812
  • MEMBER
I agree that is the theory. I just know it has been the sole change made to two vehicles with this problem and they ran after replacing the filters. I don't know how it can happen, I just know it does. If the key is cycled repeatedly the fuel pump will fail but not always in my experience. I know you are a master tech and I respect your opinion and expertise. I'm just telling you what has happened to me in the real world. I guess there is an outside chance that an intermitent problem might have exsisted and it only seemed effective to replace the filters but I doubt it.
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Thursday, September 2nd, 2010 AT 6:17 PM
Tiny
WRENCHTECH
  • EXPERT
A restricted filter will take out the fuel pump before it's capable of stopping the flow.
If the filter is plugged, the pump is bad and needs to be replaced.
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Thursday, September 2nd, 2010 AT 6:21 PM
Tiny
DWB812
  • MEMBER
OK. Now that I think of it the one rig did need a fuel pump shortly after the filter replacement due to low rail pressure. Guess you are right.
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Thursday, September 2nd, 2010 AT 8:34 PM
Tiny
DWB812
  • MEMBER
Please disregard any post prior to this one that may have come under my user name. I left my browser open to this topic and was "pranked" by my stepson and a friend. They gave this advice and made these posts in my name. I apologize for any inconvenience this may have caused and have taken steps to ensure it will not continue.
DWB
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Tuesday, September 7th, 2010 AT 5:02 PM

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