i own the same vehicle. and mine was doing the same thing. replacing the plugs and wires helped but you will need to check the cap and rotor. if the cap and rotor are original i recommend replacing them. napaonline.con has all the parts cheep total amount was under 100 bucks
The cause of high engine idle and surges in the 1989 Corvette is due to..Read More
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The idle air control valve on a Volvo S80 is located on the intake manifold. The valve controls the rate at which the engine holds an idle.
The increased idle when started is normal, all properly working cars that aren't ancient will do it. As far as the hard shift goes, your tranny.
You need to clean (or replace - $200) the idle air valve.
The car was staying idle.
I'm not sure what year or model of the car but if its somewhat new meaning about 1994. Then the computer does it and there is no adjustment. If you getting a rough or low idle it is probably time for a tune-up. If tune-up doesn't work you may have to replace idle control valve, up to 1989 there was an idle adjustment knob on throtle body for fine tunning.
Computer needs to re-learn the idle. Spark plugs are bad. Valves are not properly gapped. Adjust Idle Speed on Throttle body.
check airflow meter
my 2002 volvo s-40 is miss firing and it is alleged that the fault is from the idle air control valve. how can i clean the valve?
V70 Petrol models The idle speed is ECU controlled and is non adjustable.
My 1998 Park Avenue stalled. I cleaned the idle air control valve (IAC) and now it is fine.