Question about 1991 Pontiac Grand Prix
Well there are several things that could cause this problem...
1. one of the coils may not be firing.
2. the ignition module could be bad.
3. the mass air flow sensor could be tellign the car to run rich (too much gas)
4. if the car is equiped with a map sensor it could do the same as a mass air flow sensor.
5. fuel pressure regulator could be leaking at vacuum port drawing in more fuel than needed.
6. the computer itself could be bad as well.
The car either has a map sensor or mass air flow not both. The mass air flow would be right after the air cleaner housing usually a 4 wire connector. map sensor is normally located on the rear of the upper intake manifold with 1 vacuum line going to it with 3 wire connector. Hope this helps.
Posted on Sep 11, 2008
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:
Feb 01, 2015 | 1998 Pontiac Grand Prix
Dec 15, 2014 | 2002 Pontiac Grand Prix
Mar 13, 2013 | 2000 Pontiac Grand Prix
Mar 24, 2012 | Cars & Trucks
Jul 04, 2010 | 2002 Pontiac Grand Prix
Mar 03, 2010 | 2000 Pontiac Grand Prix
Feb 01, 2010 | 2002 Pontiac Grand Prix
Jan 04, 2010 | 2004 Pontiac Grand Prix
Dec 27, 2009 | 2005 Pontiac Grand Prix
Jul 18, 2009 | 1992 Pontiac Grand Prix
Apr 04, 2014 | 1991 Pontiac Grand Prix
376 people viewed this question
Usually answered in minutes!