Originally Posted by
300slwannabe
Polished my stock throttle body today.
I installed the m113 throttle body and the car hasn't ran right since. I haven't tuned it which I imagine would help, but if anyone else has installed a m113 throttle body and had it run well let me know. It was an ebay junkyard part, so that could be the source of the problem. I think I'm going to give up and put the stock tb back. Car just isn't as happy with the mb airbox and larger TB and it started to throw a lean code.
Close up of polished finish
Some people had trouble snd others not, all of them did the same thing.
Some found that the computer reset itself finally after a few drives.
You say you polished the stock TB, that is the 112 part. I am assuming you meant the 113 TB was polished in which case if you forced the throttle plate open to get at the inside bore you may have damaged the throttle position sensor.