Join Date: Mar 2000
Location: Spokane, WA USA
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Howell TBI vs. Crane HI-6 CDI Fixed!
Finally, I got the Crane HI-6 Tack signal to work with the Howell TBI Computer! It was very simple but nobody really knew the answer, so I thought let the world know.
It was the Howell ‘tach filter’. Originally, by my mistake, I ordered the Howell TBI for a stock ignition and not for a Capacitive Discharge Ignition, like an MSD unit. I should have ordered one, like it says in their manual, for a CDI unit.
Well, I remove the original tack filter in the Howell wiring harness and replaced it with their $50.00 MSD tach filter and eureka, it runs!
And wow, what a difference from the stock ford dura-spark system. You can really feel and hear the new spark in that CDI unit!
What thorough me off was that the Howell techs could on tell me this originally because they had no experience with the Crane CDI. All they said was it should work with the MSD unit. Seems like the tack signals for CDI’s are similar.