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problem with engine, aircon or gear? S60

posted by  cetaphil on  Mon Sep 20 03:07 CST 2004
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I'm currently driving the volvo s60 2.0 LPT (light pressure turbo) about 3 years now.

A few weeks after the last servicing done sometime in August, I notice that whenever I start the engine followed by switching on the aircon, and then putting the gear to either R or D, the tachometer jerks violently between 700 and 800 rev/min and the car vibrates. (The usual steady tachometer reading at engine idling is about 750 rev/min.) At the same time, the headlights and interior lightings would flicker as the tachometer jerks. There was once when the tachometer jerked so badly that the eingine actually stalled.

However, this jerking does not happen when I put the gear to P with aircon on, or when I put the gear to R or D with the aircon OFF. It only happened when I put the gear to R or D with the aircon ON.

Is this the problem with the engine, aircon or gear transmission? Otherwise, the aircon and transmission are working perfectly.

Please help. Thanks.








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    problem with engine, aircon or gear? S60

    posted by  tonyg on  Mon Sep 20 05:55 CST 2004
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    last visit: Fri Aug 22 10:44 CST 2014
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    Well....something is interacting between the engine and the A/C and the only thing I can think of is the compressor and the belt that drives it. My guess would be to start looking around the compressor belt and check if it was adjusted to tight.
    --
    '82 240DL Stock / Masters Class, '94 850 Fully Loaded / Daily Driver, CVC / VCOA Member http://www.capcan.com/tonyg.htm







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