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      11-21-2017, 11:14 PM   #4
Racer35
Tombarra Stalker
United_States
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Drives: 2017 M3 ZCP, Mineral Grey
Join Date: Jul 2016
Location: Danville, CA

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Quote:
Originally Posted by jasnh View Post
Quote:
Originally Posted by Racer35 View Post
Has anyone else had an issue with erratic idle (with a stock ECU)? My 6MT is about a year old, with 17K miles, and I've noticed a stumble at stop lights over the last couple months. Idle oscillates between 500 and 750 RPM, stumbling at 500. It was only occasional a couple months ago but it happens every time now. This happens with all ECU modes and doesn't seem to have anything to do with where I buy my gas. Until recently, idle was dead-nuts-steady. Wondering if I have a bad sensor somewhere.
I recently had to have a fuel pressure sensor/module replaced on my 2015 with 22K miles.....my car showed some similar symptoms and then a few weeks later sputtered and died at a stop light, and it took me a few tries to get it started again....and I got a Drivetrain Malfunction error because of it.
That sounds about right. I don't have a malfunction light yet, but haven't had it stall... Hopefully they'll be able to diagnose it easily without error codes.
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