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1996 Chevrolet Blazer 4.3L Excessive Emissions, Poor Idle Quality, Surge
Posted to GM Driveability on 4/18/2010 32 Replies

I am looking for some help with this fuel system. Running very rich at idle and off idle. When I first check fuel preasre it was right at 53-55 and would bleed off slowly when stopped. I cleared codes nd was only able to confirm the multi cly misfire. i suspec...

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car Vehicle Data

1996 Chevrolet Blazer

VIN 1GNDT13W3T
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Poor Idle Quality, Surge
OccursHot

Trouble Codes

P0102Mass Airflow Sensor Circuit Low Voltage
P0147Heated Oxygen Sensor (Bank 1 Sensor 3) Heater Circuit Malfunction
P0155Heated Oxygen Sensor (Bank 2 Sensor 1) Heater Circuit Malfunction
P0300Multiple Misfire Detected
P0440EVAP System Leak Detected
Message Closed w/FIX

car Vehicle Data

1996 Chevrolet Blazer

VIN 1GNDT13W3T
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Poor Idle Quality, Surge
OccursHot

Trouble Codes

P0102Mass Airflow Sensor Circuit Low Voltage
P0147Heated Oxygen Sensor (Bank 1 Sensor 3) Heater Circuit Malfunction
P0155Heated Oxygen Sensor (Bank 2 Sensor 1) Heater Circuit Malfunction
P0300Multiple Misfire Detected
P0440EVAP System Leak Detected