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Discussion Starter · #1 ·
soemtimes just when i turn it on...sometimes when it cranks...cant find the bentley right now...easy solution?
 

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Re: why does my tach shoot up with turning of key (glibobbo21)

check your connections on the back of the instrument cluster. and coil.
mine did that. But then again, that didnt help. it went. I had to replace it.

It's getting an electrical current when it shouldnt.
 

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Re: why does my tach shoot up with turning of key (glibobbo21)

Mine does that exact same thing
. Only happens about twice a month so Im not realy concerned about it.
 

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Re: why does my tach shoot up with turning of key (N2ORBT)

Check your ground wires, especially the ones from engine to body.
With a bad ground maybe the ignition gets its ground through the inst.cluster.
You dont run an MSD ignition by chance?
 

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Re: why does my tach shoot up with turning of key (grasshopperdrag)

Check your battery terminal connections. Mine does that when the terminals get corroded.
 

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Discussion Starter · #7 ·
Re: why does my tach shoot up with turning of key (ValveFloat)

yeah i actually tighten the terminals they were almost falling off..thanks guys..this is my new 16v so it hasnt been on the road yet BTW
 
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