Help, did I just ruin my engine?
07-18-2015, 08:59 AM
#27
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Join Date: Sep 2012
Location: Montreal, Quebec
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2009 E350 4M Avantgarde;mistress 2002 S600; wife 2014 C300 4M
My rule is:
NEVER replace any part on these V12 engines & car unless you are absolutely SURE to have identified the component.
That of course requires a DAS system.
MB dealers always automatically say "probably the coil pack"; but these also have the red silicone rubber spark plug inserts, which can cause firing failures.
So is the ignition inverter, which is really two separate channels, and can cause a coil pack non-function.
Good luck!
NEVER replace any part on these V12 engines & car unless you are absolutely SURE to have identified the component.
That of course requires a DAS system.
MB dealers always automatically say "probably the coil pack"; but these also have the red silicone rubber spark plug inserts, which can cause firing failures.
So is the ignition inverter, which is really two separate channels, and can cause a coil pack non-function.
Good luck!
07-31-2015, 11:14 PM
#28
Senior Member
Thread Starter
Well, I have an update for you guys. Turns out the coil pack wasn't the issue at all.... they tested out my coil pack on a CL600 and it worked fine, and put in another brand new one inside my car and my car STILL misfired. So this says the coil pack is not the issue at all here. My mechanic is confused as to what the issue really is.... he said he will test everything in the car on Sunday but we still don't know what the real issue is that causes these cylinders to misfire. Any ideas guys?
08-02-2015, 01:24 AM
#30
Senior Member
Thread Starter
08-29-2015, 07:30 PM
#31
Senior Member
Thread Starter
I just thought I'd update this thread in case anyone wants to refer to it when having the same issue that I was having. My car ended up working perfectly fine when the ignition voltage transformer was replaced. So if your car is giving you misfire errors, do NOT always resort to replacing the coil packs. First, check if the ignition voltage transformer is giving power to the coils normally. If not, then replace that. If it is giving power normally, test each spark plug in the coil packs to see if they are all working properly. If not, then replace the coil pack. If BOTH the ignition voltage transformer and the coil pack is not working properly, which was my case, then replace both those parts. I hope this information was useful to anyone for future reference.
