The only thing you can set is base ignition timing. The ECM takes care of timing on a moment by moment basis after the engine is running.
In order to set base timing you need to disconnect the spout connector, start the truck and set timing to about 10 deg BTC. Some people set it as high as 13 deg, but then you run the risk of detonation at that setting, plus emissions tends to go up the more you advance the timing.
Shut the truck off, reconnect the spout connector and that should do it for ignition timing.
The spount connector is a little plastic doohicky on the wire bundle coming off the TFI module. I just pull it out and set it somewhere safe while setting the timing.
Friday, December 28th, 2007 AT 9:06 PM