Stall under braking
08-10-2017, 09:15 PM
#1
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My Ride: E60
Model Year: 2010
Stall under braking
Hi,
Anyone have any ideas why a N52 engine would stall under hard braking , at random times?
Not always under braking it would stall, But when it does stall, The only way to get the car back to start is to get a jump-start.
On the forms, it someone say it is a sign of a failing brakes booster/vacuum leak,. But would having that result in the car not being able to start without getting a jump after the stall?
Anyone have any ideas why a N52 engine would stall under hard braking , at random times?
Not always under braking it would stall, But when it does stall, The only way to get the car back to start is to get a jump-start.
On the forms, it someone say it is a sign of a failing brakes booster/vacuum leak,. But would having that result in the car not being able to start without getting a jump after the stall?
08-10-2017, 10:03 PM
#2
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Next time it does it, before getting a boost try starting it as if it's flooded (press gas pedal to the floor and hold). Sounds like you're overfuelling for some reason. And get your codes read out.
08-10-2017, 10:56 PM
#3
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My Ride: E60
Model Year: 2010
Will get codes tomorrow, But I tried that method as well pressing - the gas pedal to floor and still no start. It sounds like it wants to start, but doesn't.
08-11-2017, 12:12 PM
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My Ride: 2007 530xi: Sport, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, HD Radio, SAT, Custom NCS coded options 2008 535xi: Sport, Night Vision, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, SAT, Custom NCS coded options, Rear Seat Heat Retrofit, Passport 9500ci
Model Year: 2008
Engine: N54
the only thing a jump start brings to the scenario is your own battery or other parts of the battery/charging system is too weak to restart it again.
Perhaps getting a high compression situation for some reason and the battery can't overcome it? and the high compression is also what causes the stall?
Perhaps getting a high compression situation for some reason and the battery can't overcome it? and the high compression is also what causes the stall?
08-14-2017, 02:06 AM
#5
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Need more details of your car, like year, model and manual or auto transmission?
What really happens when you can't start after stall?
Engine not turn over or when you try to start??
Also got,any faultcodes after stall?
What really happens when you can't start after stall?
Engine not turn over or when you try to start??
Also got,any faultcodes after stall?
Last edited by cmyachtie; 08-14-2017 at 02:28 AM.
08-17-2017, 04:42 PM
#6
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My Ride: 535
Model Year: 2008
same thing is happening to my 2008 535i
only when cold it would try to stall when braking hard and sometimes it would actually stall
but mine restarts right up. no codes.
only when cold it would try to stall when braking hard and sometimes it would actually stall
but mine restarts right up. no codes.
08-18-2017, 08:42 AM
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My Ride: 2007 530xi: Sport, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, HD Radio, SAT, Custom NCS coded options 2008 535xi: Sport, Night Vision, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, SAT, Custom NCS coded options, Rear Seat Heat Retrofit, Passport 9500ci
Model Year: 2008
Engine: N54
Try this diagnostic test:
With the engine running at idle, Remove the oil filler cap.
Is it REALLY hard to remove? (due to a lot of vacuum)
After you remove it, does the engine start to idle roughly?
With the engine running at idle, Remove the oil filler cap.
Is it REALLY hard to remove? (due to a lot of vacuum)
After you remove it, does the engine start to idle roughly?
08-19-2017, 09:44 PM
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My Ride: 535
Model Year: 2008
wasn't hard to remove and there was no rough idle with the oil filler cap opened.
i have the RB PCV valve, i don't know if that changes anything. And no aftermarket catch can.