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Re: oil filler-cap effect on idle--how much?

Gday Phil

you wrote:
..., I pulled the ISV
connector off, and the idle speed increased by a couple of hundred rpm   
about 1000), which I assume indicates we have a working ISP? But when I
reconnected it, there was _no_ effect (reduction) on idle ....

This is infact normal, the computer has to be reset (ie engine switched   
off) when ISV is disconected and reconnected back.
My 1991 Audi 90 does the same thing