1999 Chevy S-10 no fuel no fire

Tiny
RAMBLER 64
  • MEMBER
  • 1999 CHEVROLET S-10
I have a 1999 Chevy S10 with serious problems. The fuel pump does not run, it cranks over fine but there is no fuel and no fire. The trouble code shows a weak O2 sensor only. I am suspecting a faulty ground. Can anyone please help?
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Saturday, May 21st, 2011 AT 9:49 PM

5 Replies

Tiny
WRENCHTECH
  • EXPERT
Have you verified power to the fuel pump on the gray wire. If you verify power, the pump itself is the most common failure.
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Saturday, May 21st, 2011 AT 10:36 PM
Tiny
RAMBLER 64
  • MEMBER
I get no fire even with starter fluid.
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Saturday, May 21st, 2011 AT 11:21 PM
Tiny
WRENCHTECH
  • EXPERT
Then you need to start from scratch.

All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.

Every engine requires spark, fuel and compression to run. That's what we have to look for.

These are the basics that need to be tested and will give us the info required to isolate a cause.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.

2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.

3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.

4) If all of these things check good, then you would need to do a complete compression test.

Once you have determined which of these functions has dropped out,
you will know which system is having the problem.
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Saturday, May 21st, 2011 AT 11:47 PM
Tiny
RAMBLER 64
  • MEMBER
I am a retired certified master technician and have checked out all the obivious. I am suspecting a faulty ground. Could you help me out on how to find it and/or repair truck?
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Sunday, May 22nd, 2011 AT 1:08 AM
Tiny
WRENCHTECH
  • EXPERT
If I'm going to help you, then we have to do it my way. Right now you don't know what functions you're lacking and your taking wild guesses. I don't work that way. I need to know exactly what doesn't work and then I can isolate why.
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Sunday, May 22nd, 2011 AT 1:17 AM

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