HARD STARTING, CRANKS OK

GMC Safari

Tiny

alternator1

June, 17, 2007 AT 7:51 PM

Hello I have a 1999 GMC AWD Safari with 124000 miles. I have no codes, hard or soft. After car sits overnight I have to crank it repeatedly before it will finally start. Once it has started, it continues to run and will start normally, until it sits again. I have checked the fuel pressure it is fine maintains about 55 lbs and holds pressure after shutting off engine. If I pour just a very little amount of gas into the intake the vehicle will start and run. It seems now to be missing or backfiring when I get it started now and then tromp on the accelerator. The tail pipe looks to be running pretty lean. I am at my wits end, after searching exaustivley on the internet. I unplugged the throttle positioning sensor and didn't seem to make a difference. Hope someone can help. Thank you, John

FOUND 3594 RELATED QUESTIONS

1991 Hard To Start

41 ANSWERS
4 IMAGES

Engine Does Not Stay Running

33 ANSWERS
8 IMAGES

1 Answer

Tiny

cesar lomeli

January, 14, 2008 AT 9:39 PM

First try checking your spark plug gaps on all cyls. If you have havent changed your plugs. If you havent I recommend you do it that way you know you have clean and correctly gaped plugs

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