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Old Jan 20, 2009 | 07:45 AM
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Default TAC module

Originally Posted by chevrev
After doing some research, it appears that the 1518 code is related to the TAC module...isn't that only used for DBW throttle bodies? I am using a cable driven (non-electronic) t-body.

Could my PCM be programmed for a DBW setup? Could this be why the engine bogs down and won't rev?
With DBW, the TPS signal comes from the throttle actuation motor. It communicates w/ the PCM, thru the TAC module.
If you have a cable setup, and a DBW program, the PCM is not getting a TPS signal. Thus no accel enrichment. That = lean/knock possibilities.
B4 I went further, I'd take a look at the PCM w/ a tuner. [IE: EfiLive]
PS: Just looked at my EFILIVE.. I see 15 PIDS referring to the DBW.

Last edited by Old Geezer; Jan 20, 2009 at 08:53 AM.
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