misfiring

Odd erratic misfire on my 420SE. No obvious faults, can't see any vacuum leaks, plugs are new fancy Bosch ones, plug lead look good, no sign of tracking in the dizzy. Only iffy looking thing is the king lead. Or it could be coil... Any known issues that cause erratic misfire? It feels more...

I've been having on and off recently in the hot weather misfiring that won't go away. When its cold, say in the late evening the car runs as it should. During the day when its much warmer the car once its up to temp is misfiring and stalling like crazy. I've put new Bosch HT leads...

I have a lovely SL500 with about 46000 miles Just serviced by MB Guildford with no issues Came back the 100 miles to home from Cambridge at a fair pace No problems until I was 1/2 mile from home and the car seemed to start missing a beat Took it out on Saturday and it seems to be fine...

Hi all I recently bought a 1999 c230k which has covered just over 100000 miles , when I firstgot the car it ran great plenty of power in the right places , but after having it a couple of month it's started miss firing a lot and will not Rev out at all, I have had it on the computer and it has...

Hi I went to view this MERCEDES-BENZ E CLASS 3.0 E350 CDI BlueEFFICIENCY Avantgarde 7G-Tronic 5dr Estate for sale in Stockport | Auto Trader today with the intention of making an offer for a straight sale. Everything was in order until the engine was started. It started and idled fine for circa...

My 2003 c230k has developed a misfiring problem when it is idling. Basically the engine management light comes on and it goes into limp home mode after no more than a couple of mins idling in traffic or at lights etc. had a diagnostic done yesterday and it shows a misfire on 3. Changed over...

Hi Guys, I have had this Merc E220 2007 with 135k miles, for the last 8 months and it has been never driven like any other Mercedes I had. I have many issues with the car and the dealers are unable to pinpoint the issues. I have a service plan with Mercedes but they are refusing to service...

Hi All Sorry my first post is a cry for help! I have owned now for a couple of months a 1979 SL350, she has only done 62000 miles. In the last 20 years she has done about 120 miles a year mainly being mot'd. It came with a slight misfire that has steadily got worse. So far I have replaced...

Hi, I've been having issues with my 300 24v SL recently, it would run fine on startup and then stall or misfire once warmed up. I changed the distributor cap and it seemed to sort it out, which did work, but ive now bought it out again and it has started to play up again. However, now it wont...

Hi All! I've read trough many threads about M111 idle problems. This problem is up since 3 years, always had a little improvement, not shakin the chassis as much as it did before, but i still hear it misfires on idle. First thing that i've noticed before, the purge valve was stucked open. It...

Hi. I have a 1988 w126 300 Se. i work at sea so i let my car stand unstarted for a month at a time. usually it's no problem, but 3-4 times during this year it has been very shaky when i run the engine, and it seems like one nozzle stops on one cylinder. I only need to stop and start it a few...

Hey all, my 2005 SLK 200 engine warning light has come on after a few minutes of sudden erratic idling. I have a cheapo diagnostics machine which just told me all 4 cylinders were misfiring - obviously! I am off to MB dealer tomorrow for their opinion, but would love any advice to see if I...

I've got a progressively developing fault on my W124 estate. It started in the colder weather when at start-up the engine sounded like it was firing on three cylinders for about 10 to seconds, then it would clear itself and run smoothly. Now the weather has warmed up, the lumpy running at...

Hi all I have got the following codes coming up - 0306, 0304 and 0300:(. From going through the net I see that coil pack issues seem to be a common problem on v12 engines for my CL65 (215). I have checked the part numbers on the coil packs and the driver side seems to be the updated one...

Hi, Has anyone had to replace a flywheel to fix engine misfiring or stalling in a WDB124022-2C- with engine M111.960 ? This particular flywheel has the 4 steel tabs to trigger ignition via L5 and also one additional permanent magnet in one of the tabs so the HFM management can identify when...

Started losing power a while back, along with visible air in the fuel lines - so I naturally thought the air was the cause. finally got round to fixing the air leak today, but it hasnt cured the problem. symptoms: car starts perfectly and idles smoothly, albeit with a very slight diesel...

Hi I have recently replaced a fuel pump relay and an OVP, but i still can't crack a mystery which is driving me insane. The engine starts to misfire in traffic when it goes beyond 79 degress or thereabouts. This last for a few minutes until it comes back down to 79 then it clears. If the car...

Dear All thanks to all of you so far for helping me with my project. I just replaced the timing cover oil gasket (as well as the oil seal for the distributor rotor), cleaned up the points in the dist cap and put everything back, hoping that the problem would have been resolved. so what...

hi guys did the usual "run in" for 1000miles then just after that (first time driving hard, funny enough on the way to the dealership) on start up leaving the place, the engine was misfiring on idle (not too bad) after about a minute the CEL came up. fortunately i was outside my dealer where i...

Hello, I wonder if anyone can help me. I have a 1989 230 CE that started to misfire after a couple of years. the mechanic I use, said that the engine was dying and needed replacing. I bought a 1987 230 mercecedes with full service history and replaced the engine. the car was absolutely...