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      09-21-2016, 09:38 PM   #1
Infremo
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Question BMW MHD(?) Problems?

So just last week I performed a JB4 Backend flash by MHD. Car was working great but I did notice that the exhaust sounded weak at first. Throughout the week it sounded weak too. (Maybe the disable cold start option). Today I was driving and I floored it. The check engine light came on and I noticed the car engine was like shaking. I pulled over immediately. I shut my car off and then I waited a minute to start it back up. Once I started it back up, the startup sounded kinda weird. The engine ran a little then it shut down. The battery was still running but the engine turned off. This loop keeps happening and I don't know why. When I drive it, It goes for 10 seconds and shuts off again. Please help me. Any suggestions?
2013 335is (N54)
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      09-21-2016, 11:38 PM   #2
N54Angel
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Codes?
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      09-22-2016, 08:49 AM   #3
Socket
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Quote:
Originally Posted by Infremo View Post
So just last week I performed a JB4 Backend flash by MHD. Car was working great but I did notice that the exhaust sounded weak at first. Throughout the week it sounded weak too. (Maybe the disable cold start option). Today I was driving and I floored it. The check engine light came on and I noticed the car engine was like shaking. I pulled over immediately. I shut my car off and then I waited a minute to start it back up. Once I started it back up, the startup sounded kinda weird. The engine ran a little then it shut down. The battery was still running but the engine turned off. This loop keeps happening and I don't know why. When I drive it, It goes for 10 seconds and shuts off again. Please help me. Any suggestions?
2013 335is (N54)
You are flash back to your stock settings and see if the problem is still there
If so then check the settings in MHD. I had a similar problem when the tmap sensor option was not ticked in the MHD option menu
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      09-22-2016, 08:54 AM   #4
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OP, did you do basic maintenance before installing tune?
hint, replacing spark plugs, ignition coils, walnut blast cleaning and solenoids? I am not sure how old are these components in your car.
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      09-22-2016, 03:24 PM   #5
NoSlow5oh
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Quote:
Originally Posted by SHEEDI View Post
OP, did you do basic maintenance before installing tune?
hint, replacing spark plugs, ignition coils, walnut blast cleaning and solenoids? I am not sure how old are these components in your car.
Why did you change your avatar? I liked seeing that smile.

OP, as stated before, flash back to stock and see if the issues go away. Then go from there.
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