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      06-01-2019, 03:35 PM   #1
talmadge
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MHD Exhaust Burble Messed Up My Car?

So I flashed my car (2010 135i convertible auto trans) with MHD stage 1 and everything was great. Car ran fantastic with much more power. Went back and reflashed with optional exhaust burble. Had it set to come on in sport mode. Again ran great until I switched to sport mode. Heard the exhaust burble pop several times then service engine soon light came on. Car started running very ruff and down on power. Went back and reflashed to stock but it was no help. Any suggestions on what the problem might be and what I can do or just take it to the shop/dealership?
Edit: Just read the codes. Any ideas why this happened?
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Last edited by talmadge; 06-02-2019 at 07:02 AM..
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      06-02-2019, 12:24 AM   #2
iminhell1
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Replace plugs/coils and retry.

And after that you'll break the factory charge pipe. Replace that and try again.
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      06-02-2019, 07:04 AM   #3
talmadge
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Thanks I will give it a try.
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      06-04-2019, 10:52 AM   #4
Zygote55
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Do they same codes come back after being cleared?
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      06-05-2019, 06:32 PM   #5
talmadge
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Changed all plugs and coils. All clear now. I guess this was my fault. I should have changed them out before I did the flash.
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