P0300 Diagnostic Trouble Code Discussion for December 2024
Multiple Misfire Detected
Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.Trouble Ticket Help Requests for DTC P0300
| Help Request | Posted | |
| 2004 Chevrolet Colorado LS 3.5L Poor Idle Quality, Misfire VIN: 1GCDS19694 P0300: Engine Misfire Detected. ... 2004 Colorado 3.5L straight 5 cylinder, came in with random misfire issue. Did a leak-down and found #2 & #3 cylinder were leaking. We removed the cylinder head, sent it to a machine shop, told to replace the head. Replaced the cylinder head (re... |
December 04, 2024 | |
| 2006 Ford F-150 XLT 5.4L Poor Idle Quality, Misfire VIN: 1FTRX14506 P0300: Random multiple cylinder misfire. ... and rough running at idle. Scanned vehicle for codes and had a p0300 random multiple cylinder misfire. Road tested vehicle and drove fine, had OK power, did misfire and shake at idle. Monitored scan tool for individual cylinder misfires, misfires were... |
December 12, 2024 | |
| 2018 Jeep Wrangler Unlimited Sport 3.6L Poor Idle Quality VIN: 1C4HJXDG1J P0300: multiple misfire. Checked data and long term fuel trim is at 13% and long fuel trim on bank 2 is -1 1. Injector pulse width is lower on cylinder 2 4 and 6. I put the smoke machine on system and did not find any leaks. The strange thing to me is the cam sensor is showing o o... |
December 17, 2024 | |
| 2008 GMC Savana 3500 4.8L Misfire VIN: 1GTHG35C98 P0300: engine misfire detected. ... on, DTC: P0300, replaced spark plugs. Data stream shows cylinder #4 regularly intermittently misfiring at idle. (NO P0304 though)No misfires while driving at cruise. Engine runs smooth even at idle; misfire only detectable on scanner. Swapped coil pac... |
December 18, 2024 | |
| 2005 Chevrolet Silverado 1500 4.8L Poor Idle Quality, MIL Lamp on VIN: 1GCEC19V25 P0300: Multiple Cylinder Misfire Detected. Truck runs well cold. Truck starts hard and runs poor at idle hot. Idling low around 550 which is what data shows as desired. Truck has been then way for 40k miles (as long as customer had owned it) Data showing the truck running rich. Have tried new O2 se... |
December 31, 2024 | |
| 2005 Chevrolet Silverado 1500 4.8L Poor Idle Quality, MIL Lamp on VIN: 1GCEC19V25 P0300: Multiple Cylinder Misfire Detected. Truck runs well cold. Truck starts hard and runs poor at idle hot. Idling low around 550 which is what data shows as desired. Truck has been then way for 40k miles (as long as customer had owned it) Data showing the truck running rich. Have tried new O2 se... |
December 31, 2024 |
