Question about 1999 Pontiac Grand Prix
When going up a hill at speed the RPM's will surge from 1800 to 2200 and the car starts to buck, but when you step on the gas the car will finally down shift. If you don't push down the gas the trans, won't downshift. the problem only happens when driving at low RPM's 1500.
I had the sam problem it was because my upper ignition coil was corroded. i replaced my coils and spark plugs and wires all at once and problem solved. if you don't have the cash for that you can try cleaning the connections but that's only a temp fix it will be doing the same thing agan within abot 2 months.
Posted on Mar 05, 2009
Other possible problem is that in your transmission has an electronic solinoid mated with your transmission valve body ... When this is starting to go , you can have shifting problems, engine missfires ( IE: Bucking , Sluggish , Poor acceleration ) . Proper way to diagnose would be with an auto diag. scan of your computer ...
Posted on Feb 13, 2009
I need your help i cant get my car to go in gear i have a pontiac grand prix se edition its in park but wont go in any other gear but it does turn over.
Posted on Jan 28, 2009
Sounds like you need to check your throtle position sensor first. that will cause this problem.you can go to autozone they cancheck it with a scanner. hope this helps you out . Phil
Posted on Jan 17, 2009
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Posted on Jan 02, 2017
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