Audi 5000 idle problems
tomchr at ee.washington.edu
Sun Mar 23 11:16:11 EST 2003
Just reread your email.
>1) The ISV. I know you just cleaned it but the symptoms you describe are
>consistent with an ISV that is allowing engine vacuum to pull air past
>the regulator disk.
Do you mean that the ISV could be worn and thereby allowing more vacuum in
than called for?
> I think there is an "idle/rpm" cut off which is why
>the rpm drops back down at 1600.
That would make sense.
But there's something I don't understand. Why would engine RPM increase
when more air is pulled into the engine.
BTW: I understand that there are two computer control boxes in the 5000.
Which one controls the ISV? Where do I find it?
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