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1999 Chevrolet K1500 Suburban 5.7L Excessive Emissions, Poor Idle Quality
Posted to GM Driveability on 10/3/2008 8 Replies

THANKS IN ADVANCE this suburban idles rough - not really rough but every 3 months or so it will throw a po300. this time the misfire monitors were hi on 7, 3, and 4. [...] misfires. Freeze Frame is recorded at idle. i can drive this thing down the road and nev...

8 Replies Received (View Replies)

  Related Documents & Media  1999 Chevrolet K1500 Suburban

 
Message Closed w/Summary

car Vehicle Data

1999 Chevrolet K1500 Suburban

VIN 3GNFK16R2X
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / sefi
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Poor Idle Quality
OccursHot

Trouble Codes

P0300Multiple Misfire Detected
P0420Catalyst Efficiency Below Threshold (Bank 1)
Message Closed w/Summary

car Vehicle Data

1999 Chevrolet K1500 Suburban

VIN 3GNFK16R2X
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / sefi
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Poor Idle Quality
OccursHot

Trouble Codes

P0300Multiple Misfire Detected
P0420Catalyst Efficiency Below Threshold (Bank 1)