Setting TM back to stock had no effect.

Here's what happened on my 100% stock file:

06302008_160907 from sabrewings -- Scan Depot dot net

Question. I've just been doing partial writes. When I loaded my stock file back, I didn't do anything about the fuel trims either. That shouldn't really make a difference with PE should it?

What could be causing knock in PE like this??? Something mechanical?