
2002 Chevrolet Trailblazer LS 4.2L Poor Idle Quality, Misfire
installed new plugs, coil boots and new coil on number 3. still can read missfire counters on scanner on cylinder 3. did find vacuum leak on intake and found it warped. Installed new intake and still have the small miss on 3. When I removed the new plug it loo...
FIX posted 2/21/2012
![]()
iATN Members:
Login to view full TechHelp request Auto Repair Pros: Join iATN to read this TechHelp request Vehicle Owners: Find a nearby iATN member to repair your vehicle (View Replies)13 Replies Received(Hide Replies)13 Replies Received
|
Message Closed
|
VIN | 1GNDT13S72 |
Engine | 4.2 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | Fuel Injection / sefi |
Emissions | OBD-II Compliant |
Symptoms | Poor Idle Quality, Misfire |
Occurs | Always, Not as Noticable at High RPM |
Trouble Codes
P0300 | Multiple Misfire Detected |
P0303 | Cylinder 3 Misfire Detected |
Message Closed
Vehicle Data
2002 Chevrolet Trailblazer LS
VIN | 1GNDT13S72 |
Engine | 4.2 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | Fuel Injection / sefi |
Emissions | OBD-II Compliant |
Symptoms | Poor Idle Quality, Misfire |
Occurs | Always, Not as Noticable at High RPM |
Trouble Codes
P0300 | Multiple Misfire Detected |
P0303 | Cylinder 3 Misfire Detected |