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2000 Chevrolet Blazer LS 4.3L Poor Idle Quality, Misfire, MIL Lamp on
Posted to GM Driveability on 7/13/2014 24 Replies

This vehicle has a P0300 code, I have replaced the Spider assembly, Ignition wires, cap and rotor, spark plug and miss fire returns. Fuel pressure and all systems seem normal. Idles very rough and smooths out a little when accelerated.

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car Vehicle Data

2000 Chevrolet Blazer LS

VIN [No VIN Available]
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / sefi
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursAlways

Trouble Codes

P0300Multiple Misfire Detected
Message Closed

car Vehicle Data

2000 Chevrolet Blazer LS

VIN [No VIN Available]
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / sefi
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursAlways

Trouble Codes

P0300Multiple Misfire Detected