[DeTomaso] This sucks, up date
Thomas Tornblom
Thomas.Tornblom at hax.se
Mon Apr 20 03:53:07 EDT 2009
SOBill at aol.com skrev:
> Paul,
>
> Here's what I think I know.
>
> Ford TFI ignitions are designed to run with the spark timing controlled by
> a computer.
> The TFI module sends a "PIP" (think of it as points opening) signal to the
> computer and the computer sends a "SPOUT" (think of it as Fire-The-Coil)
> signal to the TFI module. In the absence of a "SPOUT" signal, the TFI module
> will produce sparks at a fixed crankshaft timing.
Correct, and this is nominally set to 10° with the TFI:s. Advance is
controlled by SAW (Spark Advance Word) sent on the SPOUT line.
>
> Your description of how the engine runs sounds, to me, like you are
> running with fixed ignition timing.
>
> Exactly which model of Holley TBI do you have?
>
> SOBill Taylor
> sobill at aol.com
Good luck!
Thomas
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