• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

2000 Grand Prix 3800 Part Throttle SURGE trans???

Yeah I was thinking that too. Gonna pull the coils and ohm them. Plug terminals are non-screw on IIRC.

Car did this before plugs, wires and k&n filter. RPM varied more prior to MAF, TPS but temp was colder too.
 


I got the feeling that MAF sensors can be delicate and touchy deals. I have my "story" on LS1 alos and there was a good amount of replies telling me how many aftermarket units throw bad codes right away. The Ebay one I wrote about here ran good w/o SES light for about a week. I know you said yours is a Delco and I would assume it would be as trustworthy a brand as you would find, but...alot of what you describe sure sounds like what I been going through with my MAF sensor.
 
Yeah I was reading your thread on ls1 as well. Car came with an unknown brand replacement MAF.

Checked coils, all ohm'd fine on primary and boot sides. Lowest coil had light surface rust on the terminal the boot snaps onto. I noticed it when I did valve cover gaskets, so i cleaned it with a scotchbrite pad and dielectric greased it. I'm thinking it might be this coil causing the issue, rust is all the way to where the plastic meets the boot terminal.
 
I replaced the coil that had a rusty terminal and sprayed out the throttle body with about 1/2 to 2/3 of a can of tb cleaner. The issue seems to cleared up. Fingers crossed!
 
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