Cleaned MAF a couple days ago. Dad drove car to iowa (8 hours). Stays there for a week. Check Engine light comes on after getting more gas. He refils at empty and it stays on. He comes home saying that I caused he light. As Im buying the car its pretty much my problem any way. I took the MAF out again and took a peak at it. Looks fine to me. Even some crap still left on it. Also, it did fix my miss when the car is cold!! Im very happy with that, but not pleased with the check engine light. Seems to run fine so how could it be the MAF? Hopefully this is just a stored code from the bad fuel. I think he is off getting codes read right now. What do yall think?