Hi, I have a 96 ford t-bird with a v6. It has about 120K on it. It pings a lot while driving. If I barley press the gas it gets a lot better. Check engine light came on a while back (flashed and then went steady). I checked the manual and it said when the light flashes in one second intervals it means there was severe pinging. I disconected the battery and the engine light went off. When ever the car starts to ping (more when it's hot and going up hill) I just let off the gas and the check engine light does not go back on. I tried a scanner, but got no codes. So I went out and drove it hard while pinging so the light would come back on. I Check the codes and I came up with two. This was a while back and I don't remember them though. I do know that it said system too lean (left bank and the same thing for right bank). I've gotten a lot of opinions on what to fix, but none seem to agree. I tried fuel system cleaners and using 91 octane. There doesn't seem to be any way to adjust the timing. I just bought an o2 sensor (the one that goes on the hot side), but I haven't replaced it yet. Is that pretty easy to do? Do you think that will fix the problem? I've also heard the mass air flow sensor might be bad. I don't have much to spend on the car. I read an earlier post where you guy said " located in the wiring loom that goes to the computer you will find a small connector with a jumper. Removing that jumper will retard the timing approximately 4 degrees. This should stop your pinging and help your gas mileage.&Quot; I don't know a ton about cars. Where is the wiring loom located (driver, passenger, front or back of engine compartment) and where is the connector/jumper in the loom? What does this connector/jumper look like? What exactly is the jumper for? What will be turned off/disconected? Will its removal cause me to fail smog? (Also, I bought a slightly different tire size than recommened for this car. I got 205 75 r15 instead of 205 70 r15. Will this affect the smog test?) Thank you for your time!
P.S. Just checked your code table and the codes were P0171 System too Lean (Bank 1) and P0174 System too Lean (Bank 2)
Saturday, June 17th, 2006 AT 10:13 AM