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1991 Chevrolet R1500 Suburban Silverado 5.7L Excessive Emissions, Hard start cold
Posted to GM Driveability on 2/11/2009 27 Replies

Car came in with a cold start hard start. Running rich. Need to open throttle manually to get to start. Once started will blow black smoke for a minute or two, then will clear up. Items that have been changed: MAP sensor, pickup coil, IAC, ignition coil, spark...

27 Replies Received (View Replies)

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car Vehicle Data

1991 Chevrolet R1500 Suburban Silverado

VIN 1GNER16K3M
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
SymptomsExcessive Emissions, Hard Start Cold
OccursCold
Message Closed

car Vehicle Data

1991 Chevrolet R1500 Suburban Silverado

VIN 1GNER16K3M
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
SymptomsExcessive Emissions, Hard Start Cold
OccursCold