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2003 GMC Sonoma SLS 4.3L Poor Idle Quality, Misfire
Posted to GM Driveability on 4/20/2011 14 Replies

truck came in for emissions readiness test not complete cat and evap won't set. car has a slightly rough idle and under load mil flashes dtd po303. new plugs were put in and another garage had told them the cats where blocked.. we put on two new cats. same res...

14 Replies Received (View Replies)

  Related Documents & Media  2003 GMC Sonoma SLS

 
Message Closed w/FIX

car Vehicle Data

2003 GMC Sonoma SLS

VIN 1GTDT19X43
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire
OccursUnder Load

Trouble Codes

P0303Cylinder 3 Misfire Detected
Message Closed w/FIX

car Vehicle Data

2003 GMC Sonoma SLS

VIN 1GTDT19X43
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire
OccursUnder Load

Trouble Codes

P0303Cylinder 3 Misfire Detected