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Idle Adjustment & Normal Idle Range? 700 1989

uid 30890's pic
posted by  dnvolvo on  Wed Mar 2 13:52 CST 2005
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last visit: Wed Jun 16 03:19 CST 2010
[RELATED]

After throttle body and IAC cleaning, idle is at about 750 rpm +/- 25 rpm, occasionally moving about 50 rpm.

I noticed with the IAC test lead grounded it's about 725 rpm +/- 25, yet also moves sometimes between 700-800 rpm.

Should the idle be stable in neutral with no accessories on and the Idle lead grounded? If so, what can cause the idle to fluctuate +/- 50 rpm?

Also, is it ok to ground/unground the Idle lead while the car is running?

Thanks!

--
dnvolvo '89 765T - '91 245






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