You guys were a great help last week (or two weeks ago?) with my Bonneville problems.
Now I have a question that I hope won't offend any of you Bonne lovers....
Our other car is an 87 Buick LeSabre which has the same engine (3.8 l) as our Bonneville. It has an erratic idle in park or neutral and chugs under load but cleans up over 2000 rpm. We checked idle air control valve. We are wondering if there is any way to adjust or check the TPS control or does it have to go to the dealership? The car has 330,000 km on it.
Any help would be greatly appreciated!