yeah i know this has been cover numerous times. ive read them all.
but heres the scoop. My tach had been jumping for sometime now. but today i just replaced the external ignition coil. i rev it a little, nothing pass 2500. it seemed like it was fixed until i started reving pass 3000. it started jumping around again. let me clarify that it jumps up but never downwards. it settles back down to its last reading point. alternator and distributor a year old. wtf?
but heres the scoop. My tach had been jumping for sometime now. but today i just replaced the external ignition coil. i rev it a little, nothing pass 2500. it seemed like it was fixed until i started reving pass 3000. it started jumping around again. let me clarify that it jumps up but never downwards. it settles back down to its last reading point. alternator and distributor a year old. wtf?

RIP 4/23/12
...lets not forget, the 88" Z31 turbo, are my dailys 




thanx for the diy. 
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