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PrimeMvr PrimeMvr is offline
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Join Date: Dec 2010
Location: Iowa
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Originally Posted by TT Gasman View Post
Intercooler grounded? Sorry for the dumb question but can someone explain this to me? This might explain the intermittent problem I'm having with my tach needle.
The overboost sensor needs a ground to complete the relay circuit for the fuel pumps. Since the sensor screws into the IC in most installations, the IC itself needs to be grounded. This is usually accomplished by the mounting hardware, but if you have all rubber mounts and hoses you can end up isolating the IC and the sensor is no longer grounded.

I don't think that is your tach issue. It's more likely a wire on the back of the tach or the purple wire coming off the CDI. I accidentally tweaked the coupler on that wire doing a valve adjustment once and my tach went dead.
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Old 04-19-2012, 07:27 PM
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