Originally Posted by cn555ic
I had the same exact symptoms. Loud backfire and same codes. 29f3 and the 29dc. My issue was the LP sensor. Since you changed that out it couldn't be the issue right! Did u check with INPA to see if the sensor that u replaced is indeed working. Read the value for it on measurement block 6.
i will do that today, thanks you. i actually read your thread thats the reason i replaced the LPFS, to read the value the car has to be running correct?
the exhaust is dropped it sounds louder than Camed vette, i will install the exhaust today, then try inpa. will update back here soon
Edit: now where the heck did i put that cable