Re: Motorcraft Duraspark question...

[farna@xxxxxxx]

Sounds like an awful lot of juice is being pulled through that resistor! I didn't think the TFI ignition needed/used a ballast resistor. Better check some Ford wiring charts or applications -- may not be a resistnace wire or ballast resistor requirement for the TFI. In that case it might be pulling more amps since it can't get teh volatage reqquirement through the resistor, which would cause the resistor to overheat. 

On June 9, 2005 Tom Jennings wrote:

> I've got an AMC-labelled Duraspark box with the popular "TFI
> upgrade" parts installed. Works great. Got the Ford TFI coil for
> nearly nothing from a yard.
> 
> I installed a 1.6 ohm ballast resistor, a big ceramic job, bolted
> to the inner fender (there is no resistance wire in my home-made
> harness).  The damned thing gets skin-peeling hot -- easy 500
> degrees.  I mean, peel-your-skin-off hot like the barrel of a
> soldering iron.
> 
> The coil seems fine, only a slight temperature rise.  The
> Duraspark box is the same temp as the fender.
> 
> Is this normal?
> 
> 
> 
> 
> 
> .


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