Truck will not start easy when motor is warm

GMC SIERRA
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GOLFGR8
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  • 1 POST
Hi, I have a 95 GMC Sierra 1/2 ton with the 5.7 in it. In the morning it starts fine but if I shut it off for a short period of time before it has a chance to cool down I have a hard time getting it to run right. Seems like it only wants to run on a few cylinders and it will smoke and I smell gas. I have to keep reving the engine until it smoothes out. For some reason it doesnt seem to do it as often if once I get in it I turn the key to the "on" position for around 5 seconds then start it. The truck has 157,000 miles on it. Thanks for any help you can offer.
Jul 13, 2007 at 11:02 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
[quote:397667c919="golfgr8"]Hi, I have a 95 GMC Sierra 1/2 ton with the 5.7 in it. In the morning it starts fine but if I shut it off for a short period of time before it has a chance to cool down I have a hard time getting it to run right. Seems like it only wants to run on a few cylinders and it will smoke and I smell gas. I have to keep reving the engine until it smoothes out. For some reason it doesnt seem to do it as often if once I get in it I turn the key to the "on" position for around 5 seconds then start it. The truck has 157,000 miles on it. Thanks for any help you can offer.[/quote:397667c919]

Last major tune-up and OBD2 Code/s? Try checking the coolant temperature sensor
Jul 14, 2007 at 1:43 AM
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