[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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