In a controlled test, I started the car. RPMs surged some, like I've been noticing, and I let it idle normally for a couple minutes. Shut down.

Flash stock bin. Restart car. RPMs are dead on perfect as soon as it started, just like it should be.

Flash back to my tuned bin. Start car, still the surge. I've had to start it again since and it nearly died out (dropped to ~500RPMs, then surged to 1200, then started to settle, but still kept wavering for about 10 seconds).

Can someone look over my two bins? I've been looking at the stuff I changed and can't think of what would cause this. The zip file size is larger than the forum will allow, so I'm not sure an easy way to distribute it for someone to look over besides e-mail.

For reference, I made the changes suggested by WebRacin in his 1.0.9 tuner guide with some suggestions from Will for the 04+ transmission stuff.

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2004 Impala LS - got some mods
NAIOA Moderator

Making you think twice before picking on Impalas