1999 Chevrolet Suburban No Start

1999 CHEVROLET SUBURBAN
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GIG3
  • MEMBER
  • 2 POSTS
checked fuel pressure 50 psi. There r no trouble codes. It would start and keep running after primed until shutoff. I disconnected the connector behind the trottle body (next to where the fuel lines enter at the intake manifold) to make sure pins were clean. Now it will only run until prime is gone. Not sure how to trouble shoot the injection system :?:
Mar 12, 2007 at 9:57 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
Sorry for the late reply.

If you have the spider fuel system, that system is noted for problems. Key on engine off, the fuel pressure is 60--66 psi, start up fuel pressure can be critical. This for 5.0 and 5.7L engine.

Also, for your fuel injectors, I'd want to check voltage and ground, engine cranking.

I realize this is an old post. In the future, hope you don't have any vehicle issues, but, if you do, keep the site in mind. They are always working to improve the site and it's free.

Have a good day.
Oct 4, 2019 at 8:46 AM

Suggested Repair

For the 5.0 or 5.7L spider injection system, confirm key-on, engine-off fuel pressure is 60-66 psi; 50 psi is low. Also check fuel injector voltage and ground while cranking, since that system is known for problems.

Conversation Summary

The owner of a 1999 Chevrolet Suburban V8 reported a no-start with 50 psi fuel pressure and no trouble codes. It previously ran after priming until shut off, but after a connector behind the throttle body was disconnected it only ran until the prime was gone. The expert said spider fuel systems are prone to problems, noted that key-on pressure should be 60-66 psi on 5.0 and 5.7L engines, and recommended checking injector voltage and ground while cranking.

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