[200q20v] Problems with CC/performance

Phil Rose pjrose at frontiernet.net
Fri Aug 3 18:23:11 EDT 2001

At 1:38 PM -0400 8/3/01, Gronberg wrote:
>    There is one major problem with my car that I would like to fix. Right
>now, my
>car runs and performs fine when my climate control is turned OFF. however,
>when I
>turn it on (esp. the A/C), the idle becomes rough, the car accelerates
>slowly, and
>it will sometimes lurch when driving (almost feels like a fuel cut) it
>will lurch
>under acceleration or constant throttle (ie cruise control on a flat
>stretch of
>road.)   has anyone else experienced this before? any ideas?

 The A/C "rough idle" symptom sounds like the ISV might be faulty. Try
this: idle car with A/C turned on; then unplug the ISV electrical connector
and see if the idle speed drops significantly--it should.  Check that the
ISV hoses are tight, etc.

 A bad oxy sensor might cause surging at constant throttle, but that should
tend to be independent of using the A/C.


Phil Rose				Rochester, NY
'91 200q				mailto:pjrose at frontiernet.net

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