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      01-13-2013, 07:14 AM   #1
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N55 Problems with stalling at idle?

Hoping to purchase a 2011 335i coupe 6spd this week, I heard or read somewhere (can't remember now of course) about a problem with the car just turning off at idle on it's own, have any owners experienced that here? Thanks in advance for any help.
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      01-13-2013, 05:42 PM   #2
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My '11 N55 6MT has never stalled while idling, cold or hot. I've noticed occasional slight RPM fluctuations during hot idle, +/- 100 rpm, but it only lasts for 5 seconds and the motor never sounds or feels like it's about to stall.
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      01-13-2013, 06:46 PM   #3
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Thanks for the feedback, I just wanted to make sure it wasn't a common problem with the N55's, even though this one is under warranty nobody wants their new car sitting at the shop, not to mention it's dangerous if you ride in neutral a lot in a stick like I do.
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      01-13-2013, 10:15 PM   #4
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Quote:
Originally Posted by avol3xo View Post
not to mention it's dangerous if you ride in neutral a lo[u2b][/u2b]t in a stick like I do.
Explain the "dangerous" and "a lot" parts. The only time I'm ever in N "a lot" in any of my MT cars is at a stoplight waiting for a green with my right foot on the brake. I don't see anything "dangerous" in that scenario, especially in terms of idle stalling, and neither would someone doing the same thing in D (or N) with a AT/DSG/SMG.
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      01-14-2013, 12:12 AM   #5
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Quote:
Originally Posted by Roleez
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Originally Posted by avol3xo View Post
not to mention it's dangerous if you ride in neutral a lo[u2b][/u2b]t in a stick like I do.
Explain the "dangerous" and "a lot" parts. The only time I'm ever in N "a lot" in any of my MT cars is at a stoplight waiting for a green with my right foot on the brake. I don't see anything "dangerous" in that scenario, especially in terms of idle stalling, and neither would someone doing the same thing in D (or N) with a AT/DSG/SMG.
Whenever there is a red light coming up or I am coasting down a hill I just put it in N so it saves gas, if the car stalls or is off while I'm doing this I lose power steering and normal braking power, that could be dangerous
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      01-14-2013, 12:57 AM   #6
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Quote:
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coasting down a hill I just put it in N so it saves gas
Coming up to a light, N makes sense. I do this in the last 100 feet before a stop, but never like half a block or more before stopping. But sorry, coasting down a hill in normal driving DOESN'T save gas in N. Do people driving automatics constantly place the gearshift in N coasting down a hill, let alone coming up to a stop? Never heard of it.

Think about it ... when in gear (regardless of transmission) going down a hill, letting off the throttle *shuts off* fuel injection, therefore no fuel is being burned. If fuel injection is stopped, car slows down because no fuel is consumed. Placing a car in N while at speed still burns fuel because you are placing the car at idle. How is idle maintained? By *burning fuel* to keep the engine running! Sure the car will coast in N, but you're just burning fuel with that unnecessary, improper practice. I (as I'm sure the majority of MT drivers) let up on the throttle to coast. Zero fuel consumed until I get back on the throttle.

Proof? If your car has an instantaneous mpg gauge, watch the readout in N at speed vs. letting off the throttle at speed while still in gear. Readout in N at speed will still continue to show a reading, meaning fuel is still being consumed for the engine to maintain idle. Letting off the throttle at speed in gear, mpg readout will have no reading (or infinitesimal, i.e. 99+ mpg), meaning ZERO fuel consumption.
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      01-14-2013, 01:23 PM   #7
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Quote:
Originally Posted by Roleez
Quote:
Originally Posted by avol3xo View Post
coasting down a hill I just put it in N so it saves gas
Coming up to a light, N makes sense. I do this in the last 100 feet before a stop, but never like half a block or more before stopping. But sorry, coasting down a hill in normal driving DOESN'T save gas in N. Do people driving automatics constantly place the gearshift in N coasting down a hill, let alone coming up to a stop? Never heard of it.

Think about it ... when in gear (regardless of transmission) going down a hill, letting off the throttle *shuts off* fuel injection, therefore no fuel is being burned. If fuel injection is stopped, car slows down because no fuel is consumed. Placing a car in N while at speed still burns fuel because you are placing the car at idle. How is idle maintained? By *burning fuel* to keep the engine running! Sure the car will coast in N, but you're just burning fuel with that unnecessary, improper practice. I (as I'm sure the majority of MT drivers) let up on the throttle to coast. Zero fuel consumed until I get back on the throttle.

Proof? If your car has an instantaneous mpg gauge, watch the readout in N at speed vs. letting off the throttle at speed while still in gear. Readout in N at speed will still continue to show a reading, meaning fuel is still being consumed for the engine to maintain idle. Letting off the throttle at speed in gear, mpg readout will have no reading (or infinitesimal, i.e. 99+ mpg), meaning ZERO fuel consumption.
I'm sorry, didnt know you wrote the rule book on how to drive a MT vehicle, coasting in N allows you to coast much further, the same as if you engage the clutch while turning, if the car cut off then, could be a dangerous situation.

I didn't come here for a lesson on how to drive MT, I was just curious about what I heard, I appreciate the feedback on the original topic but didn't need a lesson on driving MT as every car I have ever owned is a MT, but thanks anyway.
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