1999 Chevrolet Tahoe Repair Question
Asked on January 3, 2013
Chevrolet Tahoe Engine Problem
5.7L stumbles on accelleration when outside temprature is below approx 70 degrees, every known sensor replaced, Chevy Dealership did a complete check....problem is not always evident. Starts up right away, cold and idles fine, engine revs up with no hesitation, except for once in a while when it's cold outside. I'm having to feather the accellator just short of the stumble and if I just about floor it, the engine wants to stall until I back off the throttle to regain fuel. Mechanics drained tank, checked pump (a-ok) and fuel pressure was about 60%. Could it be the Fuel Pressure Regulator? Thanks...this might be my last repair option, I have spent over $1,500 chasing this problem for a year. Summer time it was running absolutely great!