Rough Idle HELP!!!!!

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03-07-2003, 12:33 PM

ZyberMunster

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Join Date: Sep 2001

Location: Ft.Lauderdale

Posts: 451

Rough Idle HELP!!!!!

On my 94 Z28/LT1 A4 I have this very rough idle (interior shaking) only when I turn my A/C on. When A/C off - idle is normal, A/C on the revs are close to normal but I get the F**CKING SHAKES!! Feels like a loose plug wire.
Where should I look first??

As always thanks all!!

Laterzzz...LA

03-07-2003, 12:44 PM

Kraest

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Join Date: Oct 1999

Location: Inside Uranus

Posts: 3,167

The AC can cause things similar to that, since it's putting a load on the engine/battery and the auto is already at a low idle.

Check your voltage on the battery when you turn it on/off.

Mike

03-08-2003, 02:00 AM

ZyberMunster

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Anyone else with this prob???

03-08-2003, 10:23 AM

ZyberMunster

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mmmmm.....

03-08-2003, 10:36 AM

Larnach

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Join Date: Jul 2002

Location: San Diego PB

Posts: 816

Nope, I haven't noticed this at all, sometimes my car will shake a little bit at auto, but the A/C never changed anything. I used to drive 120 miles a day in the city during the summer at 100+ days without the 160º thermostat and the A/C on full, no shaking.

I'll look into my manual and tell you what I can find.