Question about 2000 Pontiac Grand Prix
I have a 2000 Pontiac GTP (sc), 6 months ago, car stopped in the middle of the freeway for no apparent reason. Mechanic friend messed with car for awhile and as a last resort unplugged my Mass Airflow Sensor. As soon as this unit was unplugged, car ran perfect (even got better gas mileage oddly enough) Recently the CEL came on. CEL code stated I had a bad Mass Airflow sensor. Changed sensor, plugged it in... car wouldnt start! JOY!. However, car will run without the unit unplugged perfectly fine.
On top of this, the car has now started this wonderful ''shaking'' only when the car is in drive. Every once in awhile, when i release my foot off the gas pedal the RPM gauge will also randomly shoot from 1000 to 4000 and rock back and forth shaking the car while it does this until i place my foot back on the gas pedal again...
It almost sounds like a fouled fuel injector. this is a tricky problem because it involve so many different operations. the maf is used to deliver fuel and the o2 sensor tells how much. there are 2 o2 sensors one before cat 1 after. mabey check these out visually. the computer should pick these sensors up if there bad. is this a supercharged engine? ill try to come up with some other ideas for you soon.
Posted on Mar 12, 2009
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Mar 05, 2015 | 2000 Pontiac Bonneville
Apr 10, 2014 | 2000 Pontiac Grand Prix GTP
May 15, 2010 | 2000 Pontiac Bonneville
Feb 07, 2010 | 2000 Pontiac Grand Prix
Jan 29, 2010 | Pontiac Grand Prix Cars & Trucks
Jun 02, 2009 | 2000 Pontiac Grand Am GT
Sep 11, 2008 | 1991 Pontiac Grand Prix
462 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: