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Hi, various power issues, last question, I think.

My car is so close to being perfect, but...when it hits 3k, it slows right up, hills etc a small issue when pulling from start up hills.

If I really hold it, will go over 3k, but will cough and splutter, like it's cutting turbo slightly, then clears and goes again.

Could it be Maf program? It was replaced with exact same part number, but I'm thinking person I brought it from may have changed Maf before I brought car, trying to chase problem but never programmed. Could this be likely?

It's on 136k, I am wondering should I get BMW to program it to ecu? If I disconnect it, car is slow, and still don't really pull to red line.
Cheers,
Scott
 
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