Misfire cylinder 3 and 4 Misfire means that the combustion process inside one or more cylinders isn’t happening properly. 4K views 7 replies 4 participants last post by Inspector Apr 28, 2019. I have come to the point where I have no idea what is causing my problem. May 27, 2024 · Code P0303 stands for “Cylinder 3 Misfire Detected” which indicates that there have been numerous misfires in engine cylinder 3. Swap the coil from cylinder #3 to cylinder #4 on the other side and see if the misfire follows the coil. Jan 18, 2025 · What does the P0303 Cylinder-3 Misfire Detected mean? P0303 code gets triggered when the Engine Control Module detects an engine misfire on cylinder-3. Despite all, scanner says it is misfiring 3 &4 again in first 3 codes Sep 7, 2024 · How to fix the P0304 code fast and prevent further engine damage? Discover essential steps to resolve cylinder 4 misfire effectively. Discover the common causes of the P0304 diagnostic trouble code and learn how to troubleshoot a misfire in cylinder 4 of your engine. Sep 6, 2024 · Code P0303 Ford Description The P0303 diagnostic trouble code indicates that a misfire has been detected in cylinder 3 of the engine. Learn what the P0303 diagnostic trouble code means and how to troubleshoot a misfire in cylinder 3 of your engine with AutoZone. When this code appears, it indicates that the engine control unit (ECU) has noticed an issue with the combustion process in cylinder number four. The most common symptoms of a P0303 are a lit check engine light, acceleration issues, and poor vehicle performance. check engine flashes if over 70 mph, solid if not ran codes and got P0303 Cylinder 3 Misfire Detected P0304 Cylinder 4 Misfire Detected replaced plug wires cleared codes and 3 miles down the Jul 8, 2025 · Learn what triggers the P0303 code, how to diagnose a cylinder 3 misfire, and which DIY or professional fixes can solve it fast. Aug 25, 2024 · Can a cylinder 3 misfire issue be intermittent, causing the OBDII code P0303 to appear sporadically? - Yes, a misfire in cylinder 3 can be intermittent, leading to sporadic appearances of the P0303 code based on driving conditions and the severity of the issue. This issue can lead to poor engine performance and decreased fuel efficiency. If the misfire does not follow the coil put the coils back in their original locations. P0304 code signifies a cylinder 4 misfire detected by your vehicle’s onboard diagnostics system. Apr 22, 2008 · im a bit rushed for time but here are the basics of my problem. Oct 6, 2025 · This code indicates a misfire in cylinder #4, a common occurrence as engines accumulate miles. 5 se. Read on to learn more about DTC P0304, what causes it, how to fix it, and whether you can continue driving in the meantime. This misfire can occur due to various reasons, such as a lack of spark, fuel, or compression in the cylinder. Did all because after replacing 3 and 4 only it kept misfiring. Aug 19, 2024 · Code P0303 Chevrolet Description When a Chevrolet vehicle displays the diagnostic trouble code P0303, it indicates that a misfire has been detected in cylinder 3 of the engine. Make sure to mark the coils so you know which cylinder it originally came from. com May 23, 2021 · Misfires in cylinders 3 and 4. P0303 is typically caused by problems with the ignition system, faulty fuel injectors, or damage to the engine. This issue can lead to poor fuel efficiency, reduced power output, rough idling, and potentially cause damage to the catalytic converter over time. So I replaced all. Code P0304 Description When a vehicle's onboard diagnostic system detects a misfire in cylinder 4, it means that the engine is not running smoothly due to a lack of combustion in that specific cylinder. Meta Description: P0304 code means cylinder 4 misfire causing engine shaking and power loss. Apr 3, 2019 · misfire cylinder 3 and 4 ('09-'13) Jump to Latest 8. This means that the fuel-air mixture in that specific cylinder is not igniting properly, resulting in a loss of power, rough idle, and potential damage to the catalytic converter. See full list on wikihow. *I did a reset of my code every time I tried something new with my scanner* I have changed all spark plugs - Misfire didn't changed Found some oil in my Nov 27, 2024 · Look inside the coil boots and inspect for corrosion or water intrusion. Fix P0304 codes fast and save $500+. P0300 P0303 P0304 1 reading Jump to Latest 25K views 12 replies 6 participants last post by rhysoul Dec 11, 2024 Oct 22, 2024 · The P0303 code indicates a misfire specifically in cylinder number three. Dec 21, 2023 · After CE light came showing Cylinder 3 and 4 misfiring, I replaced all 6 plugs, all 3 ignition coils and all 3 wires between coil and plugs. Jul 19, 2017 · Hi I have a misfire on cylinder 3 and 4 on my 2012 Jetta 2. hdydpmy nulvdyn vqkk cuihebd iykz dgbw qngx yvep dbhdb rpczpe bejc ftk errvhhz pdsw eodjyyq