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Apr 7, 2023 · Code was a P0300 multiple cylinder misfire, but did not specify which cylinder. I monitored misfire occurrences on scanner while driving and all cylinders on bank 1 (cyl 1,3,5,7) would misfire when the condition happened. Went to auto parts store and got 8 new coil packs ( Standard Auto UF743) and 8 new plugs (AC Delco 12622441).
Apr 27, 2017 · P0300: misfire in 1-3-5 cylinders. 2011 Jeep Grand Cherokee Pentastar V6 with about 85,000 miles. For the past week or 2 had a check engine light but I didn't get a chance to scan it. Today while in gear and at a stop light (foot on brake) engine was shaking pretty good and the check engine light was flashing and beeping (according to the wife).
Aug 18, 2012 · The check engine light (CEL) will be on. One or more misfire codes (P0300-P0308) will be stored in your pickup's PCM memory. P0300 Random Cylinder Misfire. P0301 Cylinder #1 Misfire. P0302 Cylinder #2 Misfire. P0303 Cylinder #3 Misfire. P0304 Cylinder #4 Misfire. P0305 Cylinder #5 Misfire.
Jun 1, 2020 · I changed all 4 spark plugs after getting the P0303. Still got the issue, swapped the third coil with 4th, still got misfiring at 3. Replaced all coils. Still got misfiring at 3 and random misfiring on multiple. Changed another spark plug for 3,still misfiring 3. I don't know what to look for next but fuel injector.
Dec 30, 2015 · A misfiring cylinder can cause a proportional loss of power. For example, if one cylinder misfires in a four-cylinder engine, the car will lose 25 percent of its power during each misfire. Cylinder Misfire Symptoms. Some common cylinder misfire symptoms include: Power loss and strange vibrations; Loss of engine spark; Imbalanced air/fuel ratio
Jul 17, 2021 · The code P030X (p0301-P0308) means that the cylinder number X misfires, or there is no combustion in that cylinder. For example, if the cylinder number 1 misfires in a 4-cylinder engine, it will run only on 3 cylinders and will have the code P0301, see the animation. Misfiring engine. The code P0300 stands for random misfire.
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Apr 8, 2024 · The following are some of the most common causes of code P0301. Faulty #1 spark plug. Failing #1 spark plug wire. Inoperable #1 coil pack. Cracked or damaged distributor cap. Excessive rotor button wear. Dirty, clogged, or faulty #1 fuel injector. Low compression on #1 cylinder.
