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      01-24-2023, 10:56 PM   #1
spitfun
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Drives: BMW Z4 M E89
Join Date: Oct 2022
Location: Michigan

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Car Running Rough after MHD Tune

I flashed my car over the weekend with the MHD Stage 1+. Everything seemed to go fine-it said "successful' at the end and the car started right up. I took it for first ride today,let it warm up (about 200 degrees for the oil),I did a WOT to 6.5k in 2nd getting on the highway and hit 3rd-then the engine light came on and it ran rough and seemed like it was running on 5 cylinders,I babied it home and turned the car off. about an hour later I went back out and started her up and the engine light is off and she idles fines,you guys have any ideas how it fixed itself? The only other thing I did before that first drive was to install a larger intercooler,it seems like if was a bad coil or spark plug it would still be running rough-although I did order new Eldor coils and 2 sweets of sprak plugs (OEM bosch and NGK 1 step colder) that I will install to just start with new ones...
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