Question about 2001 GMC Yukon
Truck is falling on its face when you give it fuel runs fine idling problem was worse but after replaceing fuel filter plugs and wires problem now only consists when hard accerleration is applied
Fuel supple issue-as shown be replacing fuel filter and seeing an improvement-next thing to try- put a new fuel pump in- Denny
Posted on Nov 28, 2013
Testimonial: "would this possibly be a pressure regulator going bad seeing as it is vacuum operated and there is no metering rail pressure sensor if that was going bad it would not throw a cel or would fuel pump be only possible problem?"
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Posted on Jan 02, 2017
This could be a number of things but i think that your problem sounds like a vacuum leak or an EGR problem. Try listening for leaks and try un-plugging the EGR solenoid valve one time.
Posted on Apr 17, 2009
i think if you checked the sparking plugs and map sensors then check your distributer its maybe not delivering the current nedded to perform the spark to some of the cylinders
Posted on May 30, 2009
had this problem on my neighbors 98 chevy truck with the same engine !!
it turnd out too be the fuel pressure regulator,you have too pull the upper intake too replace it!!
Posted on Jun 06, 2009
that has a votec engine in it the fuel pressure is droping at knight and it takes 60 psi before the injectors will fire most likely cause fuel pump ,leaking injector ,or a feul pressure regulator
Posted on Jul 14, 2009
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