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?

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2004 Impala LS - got some mods
NAIOA Moderator

Making you think twice before picking on Impalas