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2003 Chevy Monte Carlo

Tiny
TRUCKINMAN
  • MEMBER
  • 2003 CHEVROLET MONTE CARLO
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 82,652 MILES
My car falls flat on its face when I try to accelerate. It almost fells like it is starving for fuel but it is reading 50 psi at idle and over 60 psi while driving. If I acclerate slowly it picks up fine but if I mash the pedal it feels ilke it loses 3 cylinders. I just completed a complete tune-up and there is no change in its perfromance. What could it be?
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Saturday, February 9th, 2008 AT 12:25 PM

2 Replies

Tiny
M8TRIX01
  • MEMBER
  • 36 POSTS
It could be a coil pack going bad or it could be a Mas Air Flow Sensor, or a Throtle position sensor. Do you have a check engine light or anything?
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Saturday, February 9th, 2008 AT 1:00 PM
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Try loosening the exhaust befoe the cat converter and driving it. Loud, but if the cat is bad it will run ok
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Sunday, February 10th, 2008 AT 8:02 AM

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