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LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Idle to low?

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Old 12-08-2005, 04:44 PM
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Idle to low?
I have a 94 Formula A4. It idels between 500 and 600 rpms....is this normal or is it to low?
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Old 12-08-2005, 04:46 PM
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Re: Idle to low?
I believe the typical idle for an A4 is 650 rpm. Check for vacuum leaks as these could cause your idle to be off.
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Old 12-08-2005, 04:54 PM
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Re: Idle to low?
650 rpm in neutral, 550 rpm in gear are the original settings for idle rpm of an A4 car.
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Old 12-08-2005, 05:20 PM
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Re: Idle to low?
That sound about normal, the stock tachometer is known to be inaccurate by up to 200 rpms. I wouldn't worry about it unless it ran bad or it was randomly stalling out.
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Old 12-08-2005, 05:32 PM
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Re: Idle to low?
I agree, my a4 idles at about 550 rpm in gear and 650 in park, once warmed up.
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Old 12-08-2005, 06:37 PM
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Re: Idle to low?
Second the motion that it is normal.
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