Ok look my car runs like **** once it is warmed up. It coughs if you dont ez into the throttle. I went to a mechanic. He rode around with me with a computer hooked up. He told me it was my plug wires. I started changing them little by little, with no improvement. So nothing before tonight fixed my problem. This is exactly what happend tonight I droped my exhaust (y pipe) took out the o2 sensor. Changed the 3rd spark plug to the back on the drives side, (because i got mad the night before and left it unchanged.) I changed the first plug wire to the front on the passengers side. I started my car up with the open manafolds, just to wake the neighbors. I put the exhaust back on. My car ran BEAUTIFULL the problem was gone. I went to the gas station to put some gas in. Drove around for a couple minutes to soke up the acomplishment. I stopped and did a big burnout . Then the problem came back out of the blue right after the burnout. It coughed like hell and acted like it wasnt going to run. WTF!!!!! !!!!!!! !!!!!!

 

your cats? or opti

 

Sounds like bad oxygen sensors

 

you changed the plugs & wires right?...if so then i agree w/the guys above^^^

 

brand new opti, cap, rotor, o2 sensors, egr valve.

 

I did a massive burnout once right behind work before getting new tires. After I did that my car ran like *** as well! Except mine was a TPI motor... I can't remember what I did, if I replaced my O2 after that or what, but it either went away or I fixed it.

Your opti could be carbon corroded. Injectors need cleaning, list is so long :\