Cylinder Misfire ?
#26
Last night ran the car super hard. Car redlined stayed for a few seconds. I let off gas and the car had a sputter. Felt like an ignition issue. Engine light came on. Scared the crap out of me. Turned car off started up again and ran fine. Took to buddy's shop in morning and read the error as a Mis fire in cylinder 3. Said it can be plug, or wire opening up, or ( can't remember the name of the part ) but it's where the wires plug into on the engine. I recently in the last 5 months put Denso Iridum plugs and magnecore wires on. I'm thinking wires. Have any of you had this issue. Need the least exspensive route to fix this one.![smash](https://mbworld.org/forums/images/smilies/smashfreak.gif)
![smash](https://mbworld.org/forums/images/smilies/smashfreak.gif)
have you got your car fixed, and what was that?
#27
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2010 E350 SP / Honda Crosstour / prior vehicles - C32 modded / C300 modded / Lincoln LS modded
Still dealing
I put two new magencore wires on Cylinder 3 that was having the miss fires and everything ran great. Then 2 and 5 started missfiring. Replaced all the wires with new oem wires. Still having the issue. Put new coils on, still having the issue. Going to do all the plugs now and see. Hope to God that fixes it.
#29
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I put two new magencore wires on Cylinder 3 that was having the miss fires and everything ran great. Then 2 and 5 started missfiring. Replaced all the wires with new oem wires. Still having the issue. Put new coils on, still having the issue. Going to do all the plugs now and see. Hope to God that fixes it.
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2005 C55 AMG
I PMed you.
It got worse....Much worse....Wanna see something that you never see happen? Take a look at the passenger side below. Ever seen a roller separate, and walk itself into the side of a rocker, and make a new groove? Well you have now. The one pictured is the worst. The one next to it is starting to develop a groove as well. Also #3 has the same problem, not pictured. Just crazy...
![](http://www.code3performance.com/C32/roller2.jpg)
![](http://www.code3performance.com/C32/roller3.jpg)
It got worse....Much worse....Wanna see something that you never see happen? Take a look at the passenger side below. Ever seen a roller separate, and walk itself into the side of a rocker, and make a new groove? Well you have now. The one pictured is the worst. The one next to it is starting to develop a groove as well. Also #3 has the same problem, not pictured. Just crazy...
![](http://www.code3performance.com/C32/roller2.jpg)
![](http://www.code3performance.com/C32/roller3.jpg)
As for the timing chain, it appears to have a nice double roller setup. Now, I cannot speak emphatically for the design and durability of the MB engine, however per my own usage of double roller setups on 2 of my Grand Nationals over the years, I've never seen one fail. They don't stretch, and I would find it unlikely you're having failure there. However, I'm not an expert on the Benz architecture.
Of course I'm probably not sharing any insight you are not already aware of, but maybe some other folks can learn from it. Either way, I'll be curious to see the final analysis of your engine failure, and how deep the damage goes.
Keep us informed...
J
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it looks like its the plugs
Pulled the plugs out. 2 of them have the material at the ends melted. I have the Denso Iridium IK20. I put those in the same time I put new Magencore wires on. My theory is the wires failed and opened up and over burned the spark plug or something. I'm going back to stock everything. Exspensive lesson.
![rolf](https://mbworld.org/forums/images/smilies/rofl.gif)
#36
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2004 Capri Blue C32
Coolant
Disappearing coolant? I had the same problem, I think -- Coolant Level Low, but no leaking visible on the car or the ground? Engine misfires, etc.? Took it to the dealer under warranty. After 3 days of finding nothing (and trying to blame my Magnecor wires), they found that, in their words, "the intercooler was leaking coolant into the engine, and it was burning off." They told me it was all inside the engine and causing the plugs to misfire. They cleaned everything out, replaced the intercooler and all the plugs, and the problem was gone. Funny thing is, it didn't start to misfire until the day they were going to give it back to me because they couldn't find anything wrong. First starts in the morning smelled like leaking coolant, then nothing the rest of the day. Lucky for me it was all covered under warranty!
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wow
Disappearing coolant? I had the same problem, I think -- Coolant Level Low, but no leaking visible on the car or the ground? Engine misfires, etc.? Took it to the dealer under warranty. After 3 days of finding nothing (and trying to blame my Magnecor wires), they found that, in their words, "the intercooler was leaking coolant into the engine, and it was burning off." They told me it was all inside the engine and causing the plugs to misfire. They cleaned everything out, replaced the intercooler and all the plugs, and the problem was gone. Funny thing is, it didn't start to misfire until the day they were going to give it back to me because they couldn't find anything wrong. First starts in the morning smelled like leaking coolant, then nothing the rest of the day. Lucky for me it was all covered under warranty!
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thanks guys! Can't tell you how much this board has helped over the years
Vadim I will. Car runs like a champ now, I am back to stock plugs and wires. I was going to get the LET's but decided just put it back the way it was supposed to be. I will post pictures of the plugs tonight.
#40
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For real?? Vadim - have you any more information about this and how prevalent it was? I'm pulling mine off if there is even a remote chance of this happening.
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S600TT, R350
Car runs like a champ now
For real?? Vadim - have you any more information about this and how prevalent it was? I'm pulling mine off if there is even a remote chance of this happening.
Installation and mail order. After selling close to 50 sets in several months, I start getting a lot returns on the wires with misfire complaints and customers coming back with strange electonic problems, after we installed the wires. On a number of sets boots just fell of the wires. Putting stock wires on solved the problem.
Magnecor blaimed the customers at first, than the installer, at which point I just told them "no thank you" and send whatever stock I had, back. They never paid me back.
To his day I hear people having problems with them.
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2005 C55 AMG
Pulled the plugs out. 2 of them have the material at the ends melted. I have the Denso Iridium IK20. I put those in the same time I put new Magencore wires on. My theory is the wires failed and opened up and over burned the spark plug or something. I'm going back to stock everything. Exspensive lesson.![rolf](https://mbworld.org/forums/images/smilies/rofl.gif)
![rolf](https://mbworld.org/forums/images/smilies/rofl.gif)
If you had the ability to check your air/fuel ratio on a dyno it would certainly be to your advantage to eliminate that as being your cause.
In my own turbocharged applications I have had severe detonation that literally blew the end off spark plugs, melted spark plugs, and in one extreme case I blew the ring-land out of the side of a piston, which then melted itself smooth around the hole in the side of the piston. Again, this was all caused by excessive heat from over boosting the engine and not having enough fuel supply. This can be caused by various failures; ie 1. the fuel pump weakening, 2. not enough voltage to the pump, 3. the fuel pressure regulator failing, 4. too small of injectors --- all accompanied by excessive boost levels. Fortunately after having enough failures early in my turbo racing days, I finally learned to be absolutely sure I had ample fuel delivery, and testing my air/fuel ratio on the dyno at different boost levels to know what my maximum "safe zone" was. Being a supercharged setup, your boost is obviously dictated by the pulley size you are running, and relative to engine rpm's. However, even at stock boost levels you could still suffer detonation if any of those other items had failures or limited abilities. It's certainly worth looking into if you can.