alright, the moter is a 2.8l v6 (carbed), Ive just recently did a full tune up, plugs, wires, cap/rotor, Replaced all vacumlines that i can see, and yet, im still getting a rough idle, I dont have any vacume leaks under the carb or intake (did the carb cleaner trick), I do blieve that im gonna have to replace the cat, (the exaust is rattling, and everything is tight! down there!) do any of you have any suggests that i could try?

 

fuel filter and air filter, check the air filter up to the sun, if u can see through its good, if not replace it. replace the fuel filter if its been in the car for more than 5 thousand miles.

 

I have a K&n Filter (already recharged) and replaced my fuel filter about 500 miles ago

 

as wierd as it sounds mine did the same thing, but my cat was clogged, and all that pressure had to go somewhere......but when i replaced the cat or cats in my case( thanks to my ******* exhaust manifold, splits in to two seperate headers, instead of a y pipe) and my idle was perfect..... until i started messing with the timing

 

Have you checked the timing?

 

Timing is right around 12 degrees

 

I am not meaning to hijack this. but where is the timing SUPPOSED to be on our engines... my car is F.I. by the way. The guy taht timed my car said something about 10 before (or somethign) top dead center. is that correct? cuz it's not actding right and i need some ideas in the direction. A simple head gasket replacement...but thnks for your iput!!