Intermittent Misfire No Codes, It is intermittent and at times only cylinder #2 will misfire and then 4 & 6 will join in with lower counts. May 21, 2017 · I've been running live data with my Autel on both hondas (Pilot and Civic) and noticed that there are multiple misfires detected on various cylinders (all within minutes after engine startup). And when there are no codes and the issue is intermittent, the difficulty factor grows exponentially. So, I went ahead and replaced the evap canister/vent valve, and I blew out all the vent lines and evap lines. Longer cranking time before the engine starts. A code reader would never give you this information !!#keepwrenching #wesselmotorworks #wrenchingwith Jan 24, 2024 · Check Engine Light Flashing But No Codes: Troubleshooting Engine Misfires. Intermittent stalling at idle or while slowing for a stop. Then bank one - 1,3,5 will misfire and then clear out and act like nothing Dirt or rust can plug injector tips or filters, so one or more cylinders receive less fuel than the rest, again leading to rough running and misfire codes. Jun 3, 2020 · When you have a misfire code for a particular cylinder, you can focus on one of three things: an ignition problem, a fuel injector problem or a compression problem. Dec 15, 2018 · In this Tool Briefing, we will discuss a multiple-symptom issue (with no codes), and which tools you can use to determine the cause and correct the issue. I decided to do the timing belt & water pump since it was way overdue. Also, very rarely, when idling and at cruising speed the engine will have a little hiccup that again feels like a misfire. Symptoms: Intermittent misfire on startup, seems to get better as the truck warms up. update: basically intermittent cylinder 1&4 misfire, will randomly do it once every few minutes, then clean itself up 30 seconds later. The Misfire Monitor constantly checks the rotational speed of the Crankshaft by counting the pulses of the Crankshaft Sensor. I have a misfire that I can't track down. Dec 27, 2017 · 2004 - 2008 F150 - Intermittent shaking like misfire but no codes - The truck seems to run and drive fine but there are times when I feel a high frequency shaking. This morning it got bad so I let up on the pedal (cruising at 40mph) and it went a way. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. (intermittent= some days it do, some days it don't. sounding like subaru, no smoke, no blow by, 150psi across all 4 cylinders. In this comprehensive guide, we will discuss the various causes of engine misfires, the signs and symptoms of misfires, and how to diagnose and fix an engine misfire without a trouble code. No engine codes, no issues with the diagnostics. Everything appear to be good. . ) Truck starts and idles well, even with misfire. Oct 9, 2025 · The O2 sensor code never came back, but the p1446 code did. Jan 15, 2024 · Intermittent Misfire with no codes MK2 Jump to Latest 2. I also adjusted the valves. It does happen, where you have a misfire with no codes. We get misfires on both banks. Before that it was actually running fine. Dec 14, 2020 · As per title, have intermittent poor running/misfire that comes and goes, anyone had similar issue? Can coils/plugs cause misfire without causing a fault code? How would the car tell whether each cylinder is operating correctly? May 29, 2016 · I'm trying to collect troubleshooting ideas. 4 MultiAir Turbo 135. In this Tool Briefing we will discuss a multiple-symptom issue (with no codes), and which tools you can use to determine the cause and correct the issue. Pushed the Jan 15, 2024 · Intermittent Misfire with no codes MK2 Jump to Latest 2. Intermittent Issues & Repair Tips. Poor fuel economy and a rough, uneven idle. Inspect Fuel Injectors, Ignition Coils, Spark Plugs. Aug 17, 2016 · Intermittent Misfire, no codes 1 reading Jump to Latest 15K views 10 replies 3 participants last post by Max Sep 2, 2016 Jun 3, 2020 · Most Common Causes of Intermittent Misfire Codes Misfires that turn on the check engine light and log a cylinder-specific fault code are the easiest to diagnose. This fixed the p1446 code, but I'm still getting the misfire. We get it back together and it idles great. No codes now. Now no engine codes but I definitely have a misfire. 9K views 7 replies 5 participants last post by shilkahc Jan 16, 2024 Oct 24, 2007 · Ford Truck Enthusiasts Forums Newer Light Duty Trucks 1997 - 2006 Expedition & Navigator Intermittent misfire? but NO CODES?? Mar 12, 2017 · Hello All, I have had an intermittent single cylinder misfire for around 300 miles now and have gone through certain procedures to try and get it running correctly again. Drivers often report one or more of these signs before a full no-start shows up: Check engine light with camshaft position related codes. When the code P0303 is set in the Powertrain Computer, it means that the Misfire Monitor has detected more than a 2 percent variance in RPM between the firing of any two (or more) cylinders in the firing order. Intermittent loss of power, usually worse on days when no- or minor- misfire at startup/cold idle. In this comprehensive guide, we will discuss the various causes of engine misfires, the signs and symptoms of misfires, and how to diagnose and fix an engine misfire without a trouble code. The warranty expired a year ago and the car has now done 41000 miles, it was Feb 12, 2020 · 2003 325i. May 7, 2021 · In this article, we will take a closer look at misfire detection systems, why some misfires do not produce trouble codes, and discuss a new way of determining which cylinder (s) is/are misfiring if no misfire codes are present. It got so bad that eventually it tripped a P1374 code (misfire Jul 4, 2021 · Intermittent misfire with no codes 1 reading Jump to Latest 11K views 14 replies 4 participants last post by craig baconator Jul 12, 2021 Aug 25, 2020 · Primarily it stutters/hesitates when accelerating and it feels identical to a misfire where the truck hangs up and then surges as you try and accelerate. The model is the 1. 9K views 7 replies 5 participants last post by shilkahc Jan 16, 2024 May 7, 2021 · In this article, we will take a closer look at misfire detection systems, why some misfires do not produce trouble codes, and discuss a new way of determining which cylinder (s) is/are misfiring if no misfire codes are present. Hesitation or stumbling when accelerating away from a light. It is not related to vehicle speed or engine speed. No codes have been thrown, ever. When symptoms exist and there are no codes, it becomes a little more difficult. I had a P0174 lean code, but I tracked that down and fixed the evap leak. The vent lines and valve were full of mud, the purge line and line to the fuel tank were clean. Does Bad Gas Cause Misfire In Modern Engines? Bad fuel can still trigger misfires on modern engines, but control systems give the car more room before trouble shows up. Jul 4, 2021 · I’m experiencing misfires like “hiccups” where the engine stumbles a bit and there’s an extra puff out the exhaust (from an interruption of the flow I figure). However, once we start to drive it - we get P300 code. Feb 27, 2013 · WRX intermittent misfire - no codes! Jump to Latest 39K views 46 replies 7 participants last post by 1 Lucky Texan Oct 27, 2014 1 Lucky Texan Discussion starter In this video I will go over how you can go about fixing an engine is running poorly yet there are no check engine lights or no codes stored when you use your OBD II scanner. 6k61, pws9d, ndpkc, p8dch, qdkc, l3sc1, 2ekbd, ekxn2, iiqrc, sizau,