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Message: <blockquote data-quote="apsmith49921" data-source="post: 1512398" data-attributes="member: 25109">Some one on another forum mentioned cleaning the maf. Originally it crossed my mind but looking at the data I did I tossed that thought aside. I was only focusing on the RPM dips (highlighted yellow).Took a deeper look after he said that and I found something I didn't see before. Right before each rpm dip I'm seeing drop off on the MAF counts. I converted that to voltage and its about a .05v drop over that short time. Now we all know obd2 isn't the best and data does blip out sometimes. However it does this every single time before the rpm drop. So I pulled the maf out and I noticed some what seems to be filter oil or something like that all over the plastic. This is a 20 year old lightning maf and instead of let's clean it and play that game this is enough data for me to spend the 140 bucks on a brand new granatelli maf and filter I got off ebay. I looked at my previous logs and I would have occasional a drop that lasted a single cell but this is multiple data points in this log. I also have a log that reads the exact same rpm and maf voltage is average. 05v lower on the whole curve. What do you smart tuner folks think?</blockquote>