Clean your MAF!!!

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Bimmertech, it would be a waste to buy one because it's just gonna get dirty again after you clean and re-oil your air filter.

Years ago I chased a pinging/detonation problem and changed everything trying to figure out what was causing this. After cleaning it I had a new car,,or at least it felt like it.

What is causing this are pre-oiled filters that are soaked with oil. This clogs up the mass air meter and the computer goes nuts with crazy A/F ratios. Cleaning it is well worth the 20mins that it takes.