TPI timing advance
Race Director
Joined: Sep 2003
Posts: 16,838
Likes: 341
From: Database Error Indiana
Should be a tan wire with a black stripe sticking out of the harness near the brake booster. Warm up the car, unplug that wire. set timing, and plug the wire back up. Done deal.
Melting Slicks
Joined: Jan 2002
Posts: 2,238
Likes: 4
From: Milan
when you remove the tan wire with the black stripe probably you will see a code. disconnect the negative battery cable to clear the code that the tan wire with a black stripe has produced.
-Beppe-
-Beppe-
Advanced
Joined: Mar 2001
Posts: 89
Likes: 1
From: ca
and maybe advance just a touch
If you check the timing before you pull the tan/black wire, you will see that it's probably up close to 15-20 degrees. The ESC (electronic spark control) listens to the knock sensor and advances the timing to just below any detonation. Pulling the tan/black, essentially disables the ESC, so that you can set a base line for it. If you change the base line the ESC can't operate in the range GM designed it to.
