Engine Idles High

8.0

pretty bad
Typical Repair Cost:
No data
Average Mileage:
120,000 miles
Total Complaints:
1 complaints

Most Common Solutions:

  1. not sure (1 reports)
1991 Pontiac Grand Prix engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 1991 Pontiac Grand Prix:

Unsubscribe any time. We don't sell/share your email.

1991 Pontiac Grand Prix Owner Comments

problem #1

Dec 032007

Grand Prix 3.1L V6

  • Automatic transmission
  • 120,000 miles

A D V E R T I S E M E N T S

The engine idles very high, aprox. 1500 rpm's. Tried a new throttle sensor, 4 of them some adjustable some not. Withe the adjustable ones I could get the idle rpm's down but then the idle is very low. No happy medium. When driving the car accelerates uncontrollably to the point that driver must keep foot on brake pedal to keep car at say 35 or 40 mph. I have not found the solution for this yet.

- Steve V., West Palm Beach, FL, US

Not what you are looking for?