Quote:
Originally Posted by rjgough95
So over the weekend I installed my catless borla headers on my car and im also running the perrin cat back exhaust. After about an hour to hour and half the check engine light came on because of my setup. Well after that every time coming to a stop it would down shift very hard only from third to second. So I pulled the fuse for the ecu and cleared it and it was gone. Came back again few hours later. I did the same thing over cleared it. While I had just cleared it I made sure it was, I undid the leads for the two sensors for the header and it came back on the spot and had the same down shifting problem from third to second. I guess im hopping someone has an explanation on here for why this is, could it be some type of limp mode?
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Do you have a tune? The CEL comes on due to you not having a cat inbetween the two sensors which does throw the car into limp mode. On the other hand, you should have searched it up on the forums. Plenty of threads about the CEL throwing the car into limp mode w/o a tune.