My CEL came on the other day so i took the car to autozone to see what codes i was getting. The guy said i have a bad O2 and TPS, ive been on an E85 tune since june of this year i was wondering if this problem could be from the tune or just bad luck? I got the car tuned at AMS.

 

Either bad luck, or voodoo.

 

how about more like parts failing? a tps code could be a bad tps, could be loose connection, or it could not be calibrated right, the 02 sensor code if its for the front 02 sensor, could be a bad sensor bad connection, or a small boost leak. You need to have a scanner that can read 02 sensor voltage, see if its fluctuating or if its stuck meaning not changing voltage. As far as the tps sensor goes make sure the connector isnt broken the clips holding it on, other then that need a laptop with evoscan or ecuflash, and see what your tps is registering. Go wot and datalog a pull make sure that at wot tps is reading 100% and at idle its reading about 13%, good luck.

 

yeah im waiting for my 1.3u cable to come in so i can start logging with evoscan, thanks for the info.