Member
Hello. New everything. 750 miles on the motor, plugs, turbo upgrade, coil packs. Still misfires, and drivetrain malfunction. Ideas? Only caveat is I gutted the cats. Took to dealer, they told me the DME was bad, so I replaced with data-transferred refurbished DME. Helped a lot with other issues, but still getting misfires. I looked at the coils. Some are dusty-white on the spark plug side.
If I start off slowly and in sport mode, I won't trigger a misfire. But if there is a significant load, I'll get misfire and then the drivetrain malfunction issue. Also running rich with backfire on deceleration Using 91 octane fuel.
Thoughts? Thanks!
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BMW Tech Expert
What year is this?
Is this the Siemens MSD85 DME or the newer Bosch one?
-Abel
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- 2019 M2 Competition, self-tuned, 504whp
- 2016 Mini Cooper S
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