So when I down shift and try to pass another car my car has started jerking while at those high speeds. I tested the TPS already and it seems fine. Where do I go next? Also I have the hot air on the drivers side cold air on the passenger side issue. I see a ton of posts but no real fixes any help on this would be great also.

Car is a 2001 Pontiac Bonneville SSEI

whens the last time you replaced the air filter/fuel filter?

Just checked the air filter and it is good. Fuel filter about a year ago.

Both were recently done.

is it more like the engine or can you feel it in the steering wheel

The engine for sure.

It would help if you created a separate thread for the other issue involving the air hot/cold issue.

I edited your title so if we find a fix others can find the thread easier, I also added in the year/make for you to help assist other trying to help you.


For your jerking issue, it sounds like it could be fuel delivery related, try testing your fuel pressure regulator to see if gas is coming out of it, here is a good video that will help you do so, the part you want to see starts at the 1:50 mark.

agree with william i would check fuel stuff, fpr, proper fuel pressure. if those are fine it may be some sort of boost issue. im not real familiar with the l67 engine in your ssei for that

Are we talking a misfire, here?

Are there any codes set?

No codes. Had the blinking ses light for about 30 sec a few weeks ago. The ses light was on do to a p0442 code.