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tach not workin... need imput. (Prob the usual?)

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Old 07-07-08, 10:52 AM
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tach not workin... need imput. (Prob the usual?)

Just got a new motor etc and the rpm jumps a little on start up and then dies out. Not sure if the speedo works either. What do you guys think? Time for a rebuild on the tach. I read up and it seems they go pretty easy.
Old 07-07-08, 11:50 AM
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Mine is doing the same thing...but my speedo works fine...craziness I tell ya...craziness...
Old 07-07-08, 02:41 PM
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check your wiring to see if something got cut, trans too
Old 07-07-08, 02:46 PM
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Did you reattach the collective grounds on the front of your bumper??? I forgot them one time it drove me crazy for like a week and then i was like oh....god im a dumb ***, ran fine.
Old 11-20-08, 02:18 PM
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Originally Posted by yourmom23
Did you reattach the collective grounds on the front of your bumper??? I forgot them one time it drove me crazy for like a week and then i was like oh....god im a dumb ***, ran fine.

can i get a better location of this ground.. I just did an engine swap and everything is working except the tach
Old 11-20-08, 06:35 PM
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https://www.rx7club.com/3rd-generation-specific-1993-2002-16/engine-swap-now-i-got-some-issues-tach-boost-801709/
Old 11-20-08, 07:49 PM
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Yea there is a write up on putting new capacitors in the circuit board. This is most likely your problem.

http://www.umsl.edu/~tch9gd/Tach.pdf
Old 11-20-08, 08:05 PM
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I bought extra capacitors when I did mine, PM me if you need them.
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