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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications > Idle hiccups BMS stage 1
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      12-28-2015, 12:46 PM   #1
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Idle hiccups BMS stage 1

Anyone else have this issue? be sitting at light and it like stutters for a split second. Thinks its do to BMS or something else? Had BMS for 3 months noticed it past week or so seems to do it more often now.
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      12-28-2015, 02:58 PM   #2
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It shouldn't be. If its been doing it since you had it it could be an install issue or a bad board.
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      12-28-2015, 03:02 PM   #3
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No just started a few weeks ago. Hmmm it is getting cold and wet wonder if i need the weather proof sleave...think ill order it
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      12-28-2015, 04:22 PM   #4
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Dont think it is the JB

Do you have any other mods?

If i have a bad idle on a cold morning, first thing i look for is a bad injector
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      12-28-2015, 04:30 PM   #5
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no other mods - it does it sometimes but rare in the morning, i noticed more after driving for 30min etc and stop at a light
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      12-28-2015, 04:34 PM   #6
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Quote:
Originally Posted by f30kid View Post
no other mods - it does it sometimes but rare in the morning, i noticed more after driving for 30min etc and stop at a light
If you had a JB4, it would have been much easier to diagnose the problem.
Since you don't i recommend you either take it to a mechanic or get an OBD reader so you can check if you have any codes
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      12-28-2015, 04:39 PM   #7
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Just checked it - no codes. used Dashcommand
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      12-28-2015, 04:40 PM   #8
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I think im going to maybe reconnect BMS and see and/or take it off for a day to see
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      12-28-2015, 04:45 PM   #9
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I think im going to maybe reconnect BMS and see and/or take it off for a day to see
Yea try double checking installation and i recommend you contact BMS technical support
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      12-30-2015, 03:36 PM   #10
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Does it do it with the tune disconnected?
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