Intermittent misfire no codes.
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Intermittent misfire no codes Also, very rarely, when idling and at cruising speed the engine will have a little hiccup that again feels like a misfire. No codes have been thrown, ever. Dec 27, 2017 路 Misfires during OD and light throttle is one or two faulty coils. 馃И Next Steps I’m Considering: Compression test to check for a weak cylinder; Leak-down test if compression is low; Questions: Has anyone else experienced this exact issue? Any ideas beyond what I’ve already replaced?. They normally do not set a code unless the coil/s is a 'hard' fault failure. See full list on underhoodservice. The coil fault is shorted turns that lower the voltage output and cannot fire the cylinder reliably during the time the EGR function is called. Apr 13, 2025 路 Hey everyone, I’m hoping someone here can help me diagnose a frustrating issue I’ve been dealing with on my 2008 Hyundai Tucson (2. 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. It is not related to vehicle speed or engine speed. No codes or misfire logs on the scanner. com Aug 25, 2020 路 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. Pushed the See full list on underhoodservice. 0L 4-cylinder). This morning it got bad so I let up on the pedal (cruising at 40mph) and it went a way. repeats roughly Some possible reasons for a misfire without a diagnostic trouble code include: Intermittent misfires that don’t occur consistently enough to trigger a code; A misfire that is occurring at a rate below the threshold required to set a code; An issue with the vehicle’s OBD system itself, such as a faulty PCM or a software glitch Dec 14, 2018 路 And when there are no codes and the issue is intermittent, the difficulty factor grows exponentially. If the weak spark does produce a trouble code the root cause is usually relatively easy to diagnose and fix, but in some cases, the misfire might not produce a trouble code, even though it is obvious that the engine is mis Dec 27, 2017 路 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. Some possible reasons for a misfire without a diagnostic trouble code include: Intermittent misfires that don’t occur consistently enough to trigger a code; A misfire that is occurring at a rate below the threshold required to set a code; An issue with the vehicle’s OBD system itself, such as a faulty PCM or a software glitch Dec 14, 2018 路 When there are no codes, but there is a misfire that would typically trigger a code, use your vehicle information database to determine what the enabling criteria for setting a code is. We used Mitchell 1 to look up May 7, 2021 路 7 May 2021 We have all seen spark plugs that produce weak sparks like the one shown above, which may or may not produce a misfire that is serious enough to set a misfire code. 馃敡 Symptoms: Intermittent misfire or engine “skip” at idle, feels like the engine stumbles and the whole car shakes slightly. Apr 13, 2025 路 Intermittent shake/misfire at idle, especially when stopped and with A/C on. In the case of a misfire a P0300 (random or multiple cylinder misfire), or specific cylinder P0301-P0306 should have triggered. May 7, 2021 路 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. oxqnoncsscejmhlktctyhluvlvtnnsgzsufrklfwvoqkgs