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jumpy tachometer needle.

 
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Old 02-29-2012, 12:57 AM
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jumpy tachometer needle.

when accelerating my tachometer needle does not seem as steady and as smooth as it should be. like its wobbling or vibrating as it goes up. as far as i can tell it does this to right before v-tec hits, because at that point the needle is moving to fast to tell.

i dont experience very much hesitation and the motor sounds perfectly normal

any ideas so i can start trying to narrow down the problem?
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Old 02-29-2012, 01:11 AM
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Re: jumpy tachometer needle.

im thinking something ignition related?
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Old 03-02-2012, 12:11 AM
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Re: jumpy tachometer needle.

Have you recently done any electrical work to the car?

First thing I would check would be the grounds in the engine bay, and make sure your battery terminals are clean.


Then move down the line and it could be an issue with your distributor
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Old 03-04-2012, 06:06 PM
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Re: jumpy tachometer needle.

I had this same problem, only much more extreme, ended up that the ground below the distributor was loose, so I'd definitely follow wing's advice on checking the grounds.
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Old 03-04-2012, 11:37 PM
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Re: jumpy tachometer needle.

ok which grounds should i check and where are they located
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Old 03-05-2012, 07:53 PM
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Re: jumpy tachometer needle.

this could aslo be a cam or crank sensor going bad. if that loose ground doesnt fix it.
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Old 03-05-2012, 08:26 PM
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Re: jumpy tachometer needle.

jumpy rpm always points towards distributor. check all the wires by the dist.
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Old 03-05-2012, 08:44 PM
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Re: jumpy tachometer needle.

Quote:
Originally Posted by ledheadmatt10 View Post
ok which grounds should i check and where are they located
There are only a few grounds in the bay:


VC to driver shock tower

Power Steering bracket to driver shock tower

Transmission to battery

Battery to radiator support
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Old 03-07-2012, 01:30 AM
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Re: jumpy tachometer needle.

well i checked all the grounds and they appear to be fine.

so if its the distributor should i just replace the cap and rotor?

just a thought but i have no idea how old these spark plugs and wires are could that have an effect.
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Old 03-08-2012, 01:59 PM
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Re: jumpy tachometer needle.

fix er
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