5KT : Intermittent high idle

[quk@sievers.com (Phil Payne)]

In message <199704150642.XAA24525@netcom21.netcom.com> orin@netcom.com (Orin Eman) writes:

> (BTW eventually, the idle screw can fall out causing a fair sized vacuum
> leak and you may have problems starting.)

And a fierce whistle, especially if it happens at speed.

> For those that don't want to measure the current to the ISV, set the idle
> RPM to spec (800 on the 5000 CSQ) with a decent tach (not the dash tach)
> (AC and all electrical consumers off) and you'll be pretty close.
> I found that at the correct ISV current, I got the correct RPM.  Of course,
> if your ISV is in need of cleaning, I doubt this would be the case.

I think it also assumes constant mixture.  If the air mass sensor has been 
tampered with, it may prove impossible to set current and RPM without adjusting 
the mixture.

--
 Phil Payne
 phil@sievers.com
 Committee Member, UK Audi [ur-]quattro Owners Club