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1989 Chevrolet R2500 Suburban Scottsdale 7.4L Poor Idle Quality
Posted to GM Driveability on 6/7/1999

No [...] problem is when you put this truck in drive the IAC goes from 40 to 133 counts and the idle goes up from750 rpm to 1000 in drive and then put it in park it stays the same.I checked timing set to [...] with single wire (TAN & Black str.)[...] is 12...

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Message Closed w/FIX

car Vehicle Data

1989 Chevrolet R2500 Suburban Scottsdale

VIN 1GNGR26N8K
Engine7.4 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / Throttle body
Emissionsobd1 usfed.
SymptomsPoor Idle Quality
OccursUnder Load
Misc.2Wdr
Message Closed w/FIX

car Vehicle Data

1989 Chevrolet R2500 Suburban Scottsdale

VIN 1GNGR26N8K
Engine7.4 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / Throttle body
Emissionsobd1 usfed.
SymptomsPoor Idle Quality
OccursUnder Load
Misc.2Wdr