Mercedes benz cylinder 4 misfire. Also noticed a smell of gasoline in the cabin.
Mercedes benz cylinder 4 misfire I purchased the car 6 weeks ago, its a 2002 ML320 converted to use LPG and its covered 96000 miles. i then swapped the ignition coil with that of no 1 cylinder and sttarted the car. Jan 16, 2021 · My 2004 ML 500 with 118,000 miles tends to get a misfire on #4 Cylinder when it's damp / moist outside, almost guaranteed to do it when I go through a puddle, and also at wide open throttle. It was only cylinder 1 and no others so I ruled out the coil as 1 and 6 share the same coil on my engine (M104). If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring. . Jan 5, 2023 · Hello everyone, I really hope you guys can help me solve this crazy issue. Replace the faulty ignition coil or spark plug in cylinder 4, if necessary. May 9, 2008 · Personally if you swap it and the misfire code moves from where it was to the new cylinder I would probably buy two wires and a coil and call it a day; that way you're covered. 2 months ago same only this time #1 and #4 misfired. I have a 2003 SLK 320. I changed the spark plugs and coils less than 10K miles ago and that cleared the problem until now. I have: Replaced the #3 and #4 spark plug Replaced the # 4 Spark Plug Lead Verified that the #3 and #4 spark plugs actually spark by turning over engine with pug outside the cyclinder. When a misfire occurs, engine speed will fluctuate. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more! Aug 22, 2012 · The compression I was meaning is the compression in number 4 cylinder. It runs rough at idle, particularly if it gets hotter. Jun 6, 2015 · ODB showed #4 Cylinder Misfire. 8mm so reduced them each in turns to approx. Sep 2, 2017 · Hi all, I'm looking for some advice on a P0304 code ( misfire cylinder 4) that appears when reaching 5000 rpm. I then went ahead and checked compression on all 4 cylinders and they all showed around 175-180psi. P0304 Mercedes-Benz Code - Cylinder 4 Misfire Detected A P0304 code in a Mercedes Benz is an indicator that cylinder 4 has misfired. If there is a burned valve or bad rings, you could have low compression. The codes coming on the computer was P0303 - cylinder 3 Dec 20, 2024 · I've been getting misfire codes on cylinder 1 & 4. In the following article, we will debunk common myths surrounding this issue, provide factual information on P0304 symptoms, the essential tools for diagnosis, and Mar 1, 2023 · @rudeney and @bdusil and all, this is the updates on my Post for the Misfiring Cylinder 4. Runs terrible at idle, fine at any RPM higher than idle. It doesn’t mean that it’s failed, only that a misfire was detected. Rain is not a factor, experiencing 100+ temps but only 85 today. Also noticed a smell of gasoline in the cabin. It seems like it is intermittent but definitely returns during hard acceleration. The light will remain on until it is deleted or until the problem is addressed. Mar 25, 2024 · Misfires 2, 4, and 3 cylinders; and various other relational items due to the codes above. If after swapping coils the misfire stays at #3 you have other issues, but try the swap first and see where that leads you. 9mm or 1. cylinders 1 and 2 have yet to misfire, if it was fuel preasure wouldnt the last cyliners inline for fuel be the first to missfire? Save Share Dec 4, 2020 · Hi all, I'm looking for some advice on a P0304 code ( misfire cylinder 4) that appears when reaching 5000 rpm. Dealer said yes but could not find cause. Save Share. I have tried the following, swapping the coil pack from cylinder 4 (front nearside) to cylinder 1 (front off side), Swapping 1 spark plug from cylinder 4 (front nearside) to cylinder 1 (front off side), the up stream oxygen sensor from nearside exhaust to off side exhaust. Now the car starts but, cylinder 4 continues to misfire. If not, change swap plug wires. He drove it for a few weeks and still the code indicated a cylinder 4 misfire. Dec 21, 2023 · No anyother but it keeps repeating and #5 and #6 codes say multiple misfire detected randomly. I replaced the crank position sensor and replaced the plugs. As I was leaving Autozone it would not start. I have 2014 C250 that has a single cylinder misfire under load or hard acceleration (cylinder #3 P0303), I've replaced the spark plugs, swapped the coils around multiple times, replaced the fuel injector and used a fuel system cleaner, walnut blasted and cleaned the intake valves, reset all adoptive values and so far May 4, 2021 · About 6 months ago my 2018 Metris Cargo Van (bought new) misfired cyl #1 on startup. If none of the swaps work and the fault stays with the cylinder, do a compression test. Jun 11, 2024 · OBD2 says misfire on Cylinder 1,3 & 4. Replaced Bosch double platinum with NGK on cylinders 1234 and still started but was still shaking. Interchanged the ignition coils 1-2 position interchanged with 3-4 position Feb 19, 2010 · After about 1,100 miles I would get code P0301 (misfire cylinder 1) almost every time I would accelerate sharply. If I were the dealer I'd redo the wire harness and the coil on Jan 21, 2024 · Only a few weeks after I got the car the check engine light started coming on, the started shaking as I would slow down or come to a complete stop. Apr 23, 2009 · Misfire Merc c200 reg 2004 Hi, Just wondered if anyone has a solution to the Misfire on Merc's. Also, I was meaning are you getting fuel to that cylinder. Turned off and turned on ran fine. The codes I got from the OBD2 app are: P0301 - Cylinder 1 - misfire detected and P201A Reductant injector, unit 1, bank 2. 0mm. Jan 15, 2020 · This morning, I started the car and the check engine light is off and no sign of a misfire. Nov 13, 2010 · BenzWorld. If the problem moves it's the coil. Pertaining to the misfires, I already changed all spark plugs to the OEM plugs. 0. That would at least rule out a coil issue and you can do that on your own in 5 minutes. Again dealer said they know when and what but not why from the computer. Nov 20, 2010 · I have a 2001 s600 with misfire on cyl 4,5,6 Codes P0300, P0304,5,6 Also pening code P0142 O2 sensor. I sent it to the first mechanic and he said the spark plugs, injectors and coils need replacing, I did that and the issue was still there. Some background information that might help. Mar 24, 2024 · When it comes to diagnosing engine problems in a Mercedes-Benz, the P0304 trouble code – indicating a cylinder 4 misfire – can be a source of confusion and misinformation. Aug 4, 2024 · My next step was to swap the ignition coil to see if the check engine light followed it to another cylinder. It would not occur idling or driving gently, only when I "punched" it. Further troubleshooting that I have performed:-Swapped #4 coil pack with #2 - No change-Swapped #4 plug with #2- No change (just a double Jun 3, 2020 · I have been having a P0304 (cylinder 4 misfire) for several months. Jul 11, 2024 · My 2012 c250 is having cylinder 4 misfire issues. We drove (slowly) back to Autozone and had them check the codes again. Switched ignition coil #5 (Bosch OEM) but not the wires to 1 but OBD code still said misfire on 1 making me believe it's not the ignition coil. Then see if you can trace the wires for #4 and look for wire issues. Diagnose the specific cause of the misfire in cylinder 4 using a scan tool and performing a visual inspection of ignition components. May 22, 2021 · OK so I took the whole fuel rail system out, tested each injector and they all worked. It also has a crunch sound when I start it up and a grinding noise at times when I accelerate or turn to the left. I cleaned them with seafoam and let them sit overnight. As suggested by u guys, i cleared the code, removed the sparked plugs on the said cylinder; i observed the spacing on the plugs are close to 1. Reinstalled and the CEL went out for a bit but it was still idling rough and soon enough I once again got the old "Misfiring of cylinder 2 : Worsening of exhaust emission values after engine start (P0302)" which later turned into the Cylinder 2 Misfire Dec 7, 2015 · One thing you could try is swapping the coils around. Mine has 53,000 on the clock and misfires when stopped at lights or in traffic. Aug 30, 2022 · I got a 2003 c240 with engine misfires on cyl 4,5,6. Jun 14, 2020 · Code P0304 Mercedes-Benz Description. org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. Nov 30, 2008 · fuel enters the rail at cyl 6 5 4 and then swings arround to 3 2 1. I brought the car back home and my fiancé tried swapping coils on cylinder 5 and 4thinking if that was itthe codes would follow. Feb 6, 2008 · P0305 (2 times)misfire on cylinder 5. I've realized they only happened when it was started and idled on our VERY sloped driveway and when it was on my ramps for repair. How to Fix P0304 Mercedes-Benz. If it stays with the cylinder, then swap the coils back, but then swap plugs with another cylinder. Mar 1, 2023 · If the misfire stays with the coil, you need a new coil. It finally did after about 6 tries. Again, if the misfire moves with the plug, then replace the plug. No other fault code is present. A dirty injector or something of that sort could cause lack of fuel there. I have used Kraft German Auto in Brooklyn, NY for ever. Swap the coil from 4 with another. The misfire can be stopped by turning the engine off and restarting again but the ECU light remains on and its a misfire again when stopped at the next set of lights. I replaced the spark plugs, plug wires, coil, fuel injector, fuel filter, air cabin filter and cleaned the engine air filter and the MAF. Clean or replace the clogged fuel injector affecting cylinder 4. I assume that with the misfire, the ECU switched off the injector to cylinder 1, so I am not really concerned about the second code. #1 and 2 codes says misfire for cylinder 3 and 4 and then repeat itself the same. In the following article, we will debunk common myths surrounding this issue, provide factual information on P0304 symptoms, the essential tools for diagnosis, and Jun 11, 2024 · OBD2 says misfire on Cylinder 1,3 & 4. Code P0300, P0303,P0304 & P0110 (Intake air temperature Circuit). They've replaced, plugs, wires, switched coils, installed an engine wiring harness, a fuel injector. svwvk uafe dzwo jzvxg teolp cgw ujqqgr xoacqh nzk zor