I have a 2001 ponitac grand Prix gt. 3800 serries 2. The car has a ruff idle all the time. Sometime when starting it struggles to get up to 600 rpm then dies. Just wanted to know what this is.

335

Asked by Oct 01, 2015 at 12:03 AM about the 2001 Pontiac Grand Prix GT

Question type: Maintenance & Repair

14 Answers

31,785

time for a tune up and fuel filter?????

1 people found this helpful.
80,395

Definitely. Also, run some fuel injector cleaner through the fuel system at your next fill up. The fuel injectors on these cars are known to get gummed up. HTH. -Jim

1 people found this helpful.
335

Fuel filter was just changed at last oil change and I always run injecter cleaner though it ever 1000 miles

80,395

Have your intake manifold gaskets been done? Is the service engine soon light on? The crankshaft sensor on these engines are also troublesome. Tune ups need to be done every 100,000 miles. Check your coil packs. One or more may be breaking down. HTH. -Jim

335

I've havnt haven't the gaskets since I got the car. The light came on about 3000 miles ago but went out after a while

1 people found this helpful.
80,395

How many miles are on it? Did you have the computer scanned for trouble codes? -Jim

335

183,000 when the code I was gonna get it scanned the next since it was late at night. I went out to start it and the light was gone

1 people found this helpful.
80,395

With 183,000 miles on the car it's safe to assume that the intake manifold gaskets have been done. They normally fail between 90,000 and 120,000 miles. Even if the service engine soon light goes out the codes are still in the computer for another 60 start ups. You might try cleaning or replacing the spark plugs. Original equipment plugs were iridium and designed to last 100,000 miles. If someone put cheepo-beepo plugs in there to save money they might be shot. Try cleaning the mass airflow sensor. It may be dirty. This is especially suspect if you have one of those cold air intake filters installed. The oil in the air filter contaminates the sensor. You can clean the IAC (Idle Air Control) valve as well. It may be dirty. HTH. -Jim

335

I tried to change the plugs but I can't get the wires off the plugs

1 people found this helpful.
80,395

Oh wow! That's not good. Maybe it's never been tuned up. Are the wires grey? If so they're most likely original. They'll say "Packard Bell" or "AC Delco" and have a date code on them. Something like 9/00 or 3/01. Original wires are sometimes numbered to the cylinders as well. If they are original, you need to replace them and the spark plugs. That'll probably solve the problem. HTH. -Jim

335

There aren't originals cause they still are flexible. II can get the wires off the coil but not the plugs because I was gonna change everything back in march

335

And it only idles ruff after it has warmed up or it is hot outside

5

I tried to replace my 2008 grand prix plugs,very hard,i had to bring it in,may be worse with5.7ltr engine,its tight

335

I have eboght room on he front plugs. The wires just ont come of the plugs

Your Answer:

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 1,691 nationwide Grand Prix listings starting at $1,500.

ZIP:

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,740
  • #2
    Tom Demyan
    Reputation
    3,320
  • #3
    munron
    Reputation
    2,900
View All

Related Models For Sale

Used Chevrolet Impala
517 Great Deals out of 26,173 listings starting at $995
Used Chevrolet Monte Carlo
3 Great Deals out of 987 listings starting at $1,125
Used Pontiac Bonneville
4 Great Deals out of 327 listings starting at $2,900
Used Pontiac Grand Am
724 listings starting at $2,490
Used Chevrolet Malibu
623 Great Deals out of 51,869 listings starting at $1,550
Used Chevrolet Camaro
262 Great Deals out of 27,422 listings starting at $2,900
Used Ford Mustang
308 Great Deals out of 40,433 listings starting at $1,000
Used Pontiac Firebird
5 Great Deals out of 695 listings starting at $3,500
Used Nissan Altima
867 Great Deals out of 62,119 listings starting at $1,000
Used Honda Accord
719 Great Deals out of 103,450 listings starting at $849

Used Cars For Sale

2007 Pontiac Grand Prix GT For Sale
42 listings starting at $2,295
2006 Pontiac Grand Prix GT For Sale
45 listings starting at $1,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.