Quote:
Originally Posted by oreoOozZz
I haven't had any problems, knock on wood. A CEL early on for a lean condition but that went away in time as I believe the DME had to adjust for more air coming in.
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just to follow up on this thread, I've made several mods to my F48.
Started with the BMS intake, then added a catted DP, then the JB4, upgraded the CP, a Wagner IC, and then finally a flash tune.
I initially got CELs (P2196) after I got the DP so I fixed that with a mini cat spacer.
After the tune I was getting a P0171 (lean) CEL caused by a long term fuel trim running around 25-30%. Talked to the tuner, they never see this. So I flashed back to stock. CEL is still there. Do a smoke test, no leak (I was suspecting a vacuum leak).
So I take it to the dealer, they keep it for a week (and now I'm getting nervous b/c they can probably see that I've flashed the ECU a few times)... and they tell me that the car is running lean and at times rich b/c of the after market air intake. This made no sense to me. The intake never caused a CEL in the past. So I clean the filter and put it back on, fuel trim is still lean around 25%. So I say what the heck and put the stock intake on this morning. CEL is gone and the LTFT is down to 3% after driving it around most of the afternoon. **I use OBD AutoDoctor to read data**
Guess I'm going back to stock for now. And time to flash the tune back in.
