BMW Questions? Ask a BMW Repair Expert for Answers.
Hello, I'm Brandon - BMW tech.
Are you using factory OEM coil not aftermarket coil?
You should be installing BMW # ***** for the coil.
Please rate me positive, Thank you!
Hello, Good evening new tech here sorry about the last one he is not here now.
You do not have to rate until we fix the problem.
There is a black wire coming from the #4 coil This goes to a ground and also to an interference suppression compacitor. I suspect the issue is with the ground wire or the compacitor. If you have a weak ground it will melt everything in its way including the coil and ground wire. If you feel the wire it will be a little messed up. But you can take the protection coating off and replace with electrical tape once we are sure the wiring is good and the ground is solid.
If the wiring checks out than we have a problem with the DME ignition control module.
There are no specs on the suppressor. But if the ground wire is dropping between it that would indicate it is shorted out. Most of the times it will just be a bad ground with corrosion on it causing this concern. But I would go through and make sure it is getting a good ground. The part number is *****
Okay its the identifier on the service manual but they cannot look it up? I am going to need to opt out of this one because I do not think I am equipped to help you over the web. Sorry.