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NL Idle vibration. 

 

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 Post subject: NL Idle vibration.
Posted: Sun Apr 22, 2007 8:36 pm 
Parts Gopher
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Ride: '98 NL Concorde

Location: Sydney
NSW, Australia

Hi
I just bought a 98 NL Concorde with 106,000kms

It runs beautifully.

However, when Idling, in drive or reverse it seems a bit rough , almost a vibration or shudder.
Sometimes more noticeable than other times.

My mechanic sat in it and said I am just being a bit pedantic and he said not to worry about it. He checked the leads and the plugs and gave the car a once-over. He said he looked for all the usual suspects for the NL and couldn't fault the car in general.

The 90 NA i am selling idles smoother than this.

Any ideas on what it might be and estimate on cost?

Harmonic balanacer??

 

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Posted: Sun Apr 22, 2007 8:44 pm 
Getting Side Ways
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it would most likely be the engine mounts..

 

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Posted: Sun Apr 22, 2007 9:01 pm 
Getting Side Ways
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There is a rubber insulator, that can spin on the lower side of the mount, check it can spin...if not, mount is U/S

Sounds like its the pass side one too.

Check box mount too.
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Posted: Sun Apr 22, 2007 9:16 pm 
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Ride: '98 NL Concorde

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Car has done 106,400Ks.. is mounts likely?

How much will replacing these set me back?

 

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Posted: Mon May 14, 2007 5:36 pm 
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Ride: '98 NL Concorde

Location: Sydney
NSW, Australia

Update.

I have been told there is no way it would be the engine mounts in a car of that KMs.
So I am now trying to identify it via changing plugs - done - no change

Now leads tomorrow night. Top Gun 8.8mm

If that doesnt work we then look at the coil.

 

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Posted: Sat Jun 02, 2007 3:40 pm 
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Ride: '98 NL Concorde

Location: Sydney
NSW, Australia

Done new plugs, leads rotor and dissy cap.
No change.

Got the EFI serviced today, made a big difference , he said 2 cylinders were affected.

Still just an ever so slight vibration when idling in Drive or Rev.

But now i think i am being pedantic. :)

 

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