Mechanics

HIGH IDLE

1990 Volvo 240

Engine Performance problem
1990 Volvo 240 4 cyl Two Wheel Drive Automatic

after starting the car, the idle picks up, then progressively gets to a point and levels off I could drive the the car on level road at 35 or 40 miles per hour, but if I drive with overdrive off the idle speed will drop slightly and return depending on the grade of the road, it was fine for one hour yesterday then returned.
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Arthur koch
July 2, 2010.




Have these components checked out idle speed solenoid, throttle position sensor and throttle position switch

Tiny
Rasmataz
Jul 2, 2010.


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