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twitchy tach


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my tach will jump like a 1000rpms or so when its cold and seems to go away when it gets warm. im haveing a hard time getting it timed, it seems to be running retarded. disty go out? i was told the bushings are going out.

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have alt. checked, may be bad diodes

 

Bad diodes will not cause a jumpy tach. They will cause the idiot lights to glow though.

 

The bushing or the electronic module in the disty is going bad. My guess would be the module as it changes with temp. Easy to replace either the module itself or the disty.

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Well - there's these guys - local for me, but they will ship. They rebuild a lot of stuff for local shops. Have used them three times myself now, and I've had several friends go there. Excelent work, and they can do the vacuum advance unit as well.

 

http://www.philbingroup.com/

 

Might be someone local that does this sort of work too - good luck.

 

GD

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