Re: Sentra revs up when a/c is on

#1

Obviously it has to do with the A/C compressor, but why it revvs up to 3k is
beyond me. My Fronty only goes up ~300 rpm when the compressor kicks in...

"Ben Dixon" <dixon (AT) bmi (DOT) net> wrote

Quote:

Hi any idea why whenever the a/c is turned on the rpm races up to around
3,000? This is on a 1985 and only does it when the a/c is on. Thanks for
helping, ben
dixon (AT) bmi (DOT) net

#2

"Ben Dixon" <dixon (AT) bmi (DOT) net> wrote

Quote:

Hi any idea why whenever the a/c is turned on the rpm races up to around
3,000? This is on a 1985 and only does it when the a/c is on. Thanks for
helping, ben
dixon (AT) bmi (DOT) net

yup, this feature is called automatic "idle-up". if this feature wasn't
there, the significant extra load from the compressor would often cause
the engine to stall, due to a reduction in rpm.

your idle-up is out of adjustment. that model may use a vacuum type
of idle-up. look for the appropriate adjustment screw. the correct
adjustment would increase engine rpm only enough to offset the extra
load from the compressor.

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Re: Sentra revs up when a/c is on

Nissan Automobiles Nissan Automobiles Discussions (alt.autos.nissan)

Re: Sentra revs up when a/c is on - 06-26-2003 , 06:18 AM

Re: Sentra revs up when a/c is on - 06-26-2003 , 07:58 AM