Thread: Help! new to site and grand prix's car runs like crap!

I havn't changed my spark plugs since I got this engine, but it happened from one start to the next lol. It ran fine for the whole trip. I shut engine off and then when I went to start it and go home this was happening.

I don't have a cat tho I don't think. What will pulling the front 02 accomplish?

Ive got lots of exhaust pressure out of the tail pipes too.

Ok so I finally got a cam position code to come up. I replaced the cam angle sensor and it did not fix the problem. I performed the diagnostics in the manual to check and see if the computer is getting the signal from the CAS and it was, which led me to order a computer from ZZP. Hope this does it well keep fingers crossed.

Ok here it is....The only thing I failed to check was the ICM. The piece under the coil packs apparently went bad but threw no check engine lights. I replaced this after getting the computer in and it not fixing the issue. Now everything works great. Thanks to all who gave me ideas on what to check on. Now I can complete my car profile on here. Ill post some pics and info later.

Someone gave me good advice off the site which was to spray carb cleaner while the car was running badly and see if the rpms would go up by giving it a different source of fuel. Not the best source but something flammable. When I did this with no change I knew it was spark/timing related. And I had phantom 3x reference signal codes that didn't throw a check engine light. Thanks again.