is this a transmission going? or Catyalac converter problem or TSP or ???

2001 PONTIAC GRAND AM
300,000 MILES
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STEVEOSH
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  • 1 POST
have a 2001 grand am 3.4L V6 - when ever i go 80 KPH - the car will not go any faster when the car RPM's will go up but it will not take off. this doesn't happen all the time.

i can floor the gas pedal and nothing. I have changed the spark plugs, and wires, checked the mass air flow sensor - and replaced part of the EVAP system (solenoid)
Jun 12, 2012 at 2:14 PM
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SATURNTECH9
  • ✓ASE Certified Mechanic
  • 30,869 POSTS
  • ASE Certified Mechanic
Do you have any codes in the computer?Also i would have a back pressure test done on the exhaust.
Jun 12, 2012 at 2:25 PM
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