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1990 Volvo 760 2.3L Poor Idle Quality
Posted to European Driveability on 7/24/2001 9 Replies

The car has a constant high idle. If the hose from the IAC to the intake manifold is pinched off, the idle will drop to 500-550 rpm. There is 12 V power to the IAC, but no duty cycle from the LH control unit at any time, even if the idle is artificially slowed...

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car Vehicle Data

1990 Volvo 760

VIN YV1GX8747L
Engine2.3 L / 4 cyl / GAS
Trans4-speed Automatic
DeliveryFI / Bosch LH 2.4.1 EFI
EmissionsUS Fed Emissions
SymptomsPoor Idle Quality
OccursAlways
Message Closed

car Vehicle Data

1990 Volvo 760

VIN YV1GX8747L
Engine2.3 L / 4 cyl / GAS
Trans4-speed Automatic
DeliveryFI / Bosch LH 2.4.1 EFI
EmissionsUS Fed Emissions
SymptomsPoor Idle Quality
OccursAlways