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weird tach problem

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Old 03-03-04, 01:28 PM
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weird tach problem

hey fellas...ok well I did a search and most of the tach probs I say were not too bad...
mine is weird....
this just happened last week....i have used that tach since I bought the car.....5 years ago...I have been turbocharged for about 4 months...
ok....so the car runs normally.....tach works well until about 6 rpm....then it starts to stutter....the car does not sound like it is breakin up....sounds normal and healthy...the rpm flutters about 6 then continues downward like normal....but by then the reading I think is off....i think it reads a whole 1000rpms off...eg...if i am at 8500 it reads 7500....at least that is what I think from the exhaust tone....
but hear this....when i rev the car in neutral...the rpm pulls all the way to 8500 without a problem...
wha do u think causes this?
Old 03-03-04, 01:31 PM
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just a guess, but im going to say a bad ground
Old 03-05-04, 02:03 AM
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it's between a bad ground, bad tach signal, and a broken tach.
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