Either your timing is over 20 degrees off or your catalytic converter is plugged due to too much fuel from a bad temp sensor. It is telling your computer that you are in negative 40 and spraying way too much fuel. Replace your low temp sensor and cat and you should be good to go. Also check your valve covers and gaskets. The back fire might have also escaped there as well as coming out of your throttle body. Hope this helps. I had the same problem and I spent a lot of money before finding the correct information. That I would pay it forward!
Thursday, May 17th, 2012 AT 3:58 PM