I have a 2000 GMC Jimmy with 4.3 motor When you hit the gas it sputters and almost killls. I have changed the plugs and fuel filter.
Jan 31, 2011 at 1:28 PM
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WRENCHTECH
AUTOMOTIVE REPAIR CONTRIBUTOR
20,761 POSTS
The first thing you need to do is test the fuel pressure using a gauge. This is a high pressure system that is very pressure sensitive. It requires a MINIMUM of 55 PSI at all times.