1996 gmc Yukon vortec v8. runs great. till you let it sit 30 min then no start. checked fuel ,has 64 psi has spark. just won't start in the morning or after it sits. any clues?

Asked by Aug 02, 2015 at 09:37 AM about the 1996 GMC Yukon SLE

Question type: Maintenance & Repair

3 Answers

19,550

Need to check the fuel pressure and for spark when engine will not start.

Yes. There is both @ startup. And still nothing until I prime with a little gas. I am sure the injectors are not priming the cyclders prior to starting. I rented a fuel pressure tool and all is fine. In specs. And like I said once it starts you can drive all day ,no problems. New plugs. New cap,button,wires,fuel filter. Also it has 96,000 orig miles. I need help

19,550

Sounds like you have dirty fuel injectors add fuel injector cleaner to gas tank and clean throttle body with throttle body cleaner spray. Also check air filter.

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