I spun my car 180. It killed the engine...why?

Site Notices

[ARCHIVED THREAD] - I spun my car 180. It killed the engine...why?

Posted: 10/11/2007 5:20:11 PM EDT

a few months ago, I spun my car around. I entered a corner too fast and it oversteered.

Anyways, no big deal. But what gets me is that the engine was killed like it had an accelerometer on it that killed the ignition when I spun it.

What caused this? Is there an accelerometer/kill switch?

'95 BMW M3

Posted: 10/11/2007 5:21:49 PM EDT

[#1]

Centrifical(sp) force pushing the fuel back down the line?

Posted: 10/11/2007 5:23:13 PM EDT

[#2]

Automatic or Stick?

Posted: 10/11/2007 5:23:18 PM EDT

[#3]

Quoted:
a few months ago, I spun my car around. I entered a corner too fast and it oversteered.

Anyways, no big deal. But what gets me is that the engine was killed like it had an accelerometer on it that killed the ignition when I spun it.

What caused this? Is there an accelerometer/kill switch?

'95 BMW M3

Insufficient fuel pressure to prevent fuel-supply interruption due to CF/inertia....

Posted: 10/11/2007 5:23:22 PM EDT

[#4]

Fuel pump could not exceed the force trying to push it back into the tank. You starved the engine of fuel.

Use to do it with carb cars a lot, the trick was to keep the spin slow enough.

SLOW DOWN!

Posted: 10/11/2007 5:23:51 PM EDT

[#5]

Quoted:
Automatic or Stick?

5 speed

Posted: 10/11/2007 5:24:14 PM EDT

[#6]

My guess is the drive tires sudden change of direction probably tried to spin the engine the opposite direction... thus stalling it.

Usually it has nothing to do with fuel.

Posted: 10/11/2007 5:24:49 PM EDT

[#7]

Quoted:
Centrifical(sp) force pushing the fuel back down the line?

FTW!

Posted: 10/11/2007 5:25:08 PM EDT

[#8]

it's because the conveyer belt matched the speed of the wheels in the opposite direction, thereby causing the engine to stall.

Posted: 10/11/2007 5:25:49 PM EDT

[#9]

Quoted:
My guess is the drive tires sudden change of direction probably tried to spin the engine the opposite direction... thus stalling it.

Usually it has nothing to do with fuel.

it was in the wet...and uphill. That scenario doesn't fit.

Posted: 10/11/2007 5:25:52 PM EDT

[#10]

I guess this is a good reason why I shouldn't attempt this myself.

Posted: 10/11/2007 5:26:27 PM EDT

[#11]

it has nothing to do with gas, or anything like it

its a matter of that at one point the car was going backwards with the car in a forward gear, ie the engine tried to turn the wrong way, great way to permenantly kill an engine, ask any racer

Posted: 10/11/2007 5:26:58 PM EDT

[#12]

Quoted:

Quoted:
Centrifical(sp) force pushing the fuel back down the line?

FTW!

alright. So maybe a stronger electronic fuel pump would fix it?

Posted: 10/11/2007 5:27:21 PM EDT

[#13]

Maybe you activated - or shut off - that emergency fuel valve deal.

Guess it shuts off the fuel to the motor in case of an MVA.

EDIT:

Then again, maybe not.

Posted: 10/11/2007 5:27:47 PM EDT

[#14]

Quoted:

Quoted:
Centrifical(sp) force pushing the fuel back down the line?

FTW!

ANd FTW is?

Posted: 10/11/2007 5:30:41 PM EDT

[#15]

Quoted:

Quoted:
My guess is the drive tires sudden change of direction probably tried to spin the engine the opposite direction... thus stalling it.

Usually it has nothing to do with fuel.

it was in the wet...and uphill. That scenario doesn't fit.

Whether it "fits" or not... a sudden change in wheel speed while the trans is coupled to the engine WILL stall the motor. Doesn't matter what direction you are going... All you gotta do is stab the brakes, loop the car around or yank the E-brake. All will result in a stalled engine... unless you can dip the clutch before it happens. (Not likely)

Posted: 10/11/2007 5:31:16 PM EDT

[#16]

Quoted:

Quoted:
Centrifical(sp) force pushing the fuel back down the line?

FTW!

ANd FTW is?

FTW=For the win.

Posted: 10/11/2007 5:32:21 PM EDT

[#17]

Quoted:

Quoted:
Centrifical(sp) force pushing the fuel back down the line?

FTW!

alright. So maybe a stronger electronic fuel pump would fix it?

It has nothing to do with fuel.
Trust me.

The reason some are saying "fuel" is because they remember when carbureted motors would shut off this way... It WAS a fuel issue then, because the sudden change of direction would slosh fuel in the float bowl and uncover the jets... or slosh the fuel into bowl vent tubes, thus flooding the engine.

Your Bimmer is fuel injected right ? You have enough fuel pressure for a 2g starting line launch on the dragstrip... something you will NEVER duplicated on the street unless you spin into a wall backwards.

Posted: 10/11/2007 5:35:11 PM EDT

[#18]

Quoted:

Quoted:
My guess is the drive tires sudden change of direction probably tried to spin the engine the opposite direction... thus stalling it.

Usually it has nothing to do with fuel.

it was in the wet...and uphill. That scenario doesn't fit.

Whether it "fits" or not... a sudden change in wheel speed while the trans is coupled to the engine WILL stall the motor. Doesn't matter what direction you are going... All you gotta do is stab the brakes, loop the car around or yank the E-brake. All will result in a stalled engine... unless you can dip the clutch before it happens. (Not likely)

roger that. I remember that my clutch foot was on the floor and the engine was off. I restarted it and it was all ok.

I did dip the clutch, but maybe not enough or in time.

Posted: 10/11/2007 5:36:57 PM EDT

[#19]

Quoted:

I did dip the clutch, but maybe not enough or in time.

Bingo.

Posted: 10/11/2007 5:38:54 PM EDT

[#20]

I disagree, we use to do it all the time on wet grass in fields. The spinning friction of the tire is dramatically reduced so the change in direction does not keep the tires from spinning in a forward direction. It has to do with how fast the back end of the car whips around and how much fuel the engine is consuming. As the engine revs, while the fuel is slowed or stopped the engine starves and stalls.

Posted: 10/11/2007 5:40:22 PM EDT

[#21]

Quoted:
I disagree, we use to do it all the time on wet grass in fields. The spinning friction of the tire is dramatically reduced so the change in direction does not keep the tires from spinning in a forward direction. It has to do with how fast the back end of the car whips around and how much fuel the engine is consuming. As the engine revs, while the fuel is slowed or stopped the engine starves and stalls.

Read my reply a few posts up about carburetors.

Posted: 10/11/2007 5:47:46 PM EDT

[#22]

Quoted:
Centrifical(sp) force pushing the fuel back down the line?

"If I see 'centrifugal force' on your free body diagram you will receive a failing grade on this test"
- Dr. Wickert, Dynamics of Physical Systems, Spring Semester 1994.

Quoted:
My guess is the drive tires sudden change of direction probably tried to spin the engine the opposite direction... thus stalling it.

Usually it has nothing to do with fuel.

That is why it stalled. At one point in time, just long enough, the tires were at zero velocity with the clutch still engaged.

Posted: 10/11/2007 5:48:51 PM EDT

[#23]

Quoted:

Quoted:
I disagree, we use to do it all the time on wet grass in fields. The spinning friction of the tire is dramatically reduced so the change in direction does not keep the tires from spinning in a forward direction. It has to do with how fast the back end of the car whips around and how much fuel the engine is consuming. As the engine revs, while the fuel is slowed or stopped the engine starves and stalls.

Read my reply a few posts up about carburetors.

So how do you explain it with a fuel injected truck on wet grass?

Posted: 10/11/2007 5:54:45 PM EDT

[#24]

Quoted:

Quoted:
I disagree, we use to do it all the time on wet grass in fields. The spinning friction of the tire is dramatically reduced so the change in direction does not keep the tires from spinning in a forward direction. It has to do with how fast the back end of the car whips around and how much fuel the engine is consuming. As the engine revs, while the fuel is slowed or stopped the engine starves and stalls.

Read my reply a few posts up about carburetors.

So how do you explain it with a fuel injected truck on wet grass?

Magic.

FWIW, I know the plane will take off.

Posted: 10/11/2007 5:55:50 PM EDT

[#25]

Quoted:

Quoted:

I did dip the clutch, but maybe not enough or in time.

Bingo.

Absolufrigginlutely. The fuel PSI in an injected engine will not be affected by a simple spinout... Listen to the Dragracer, & stay in the throttle!

Posted: 10/11/2007 5:58:11 PM EDT

[#26]

Quoted:

Quoted:
My guess is the drive tires sudden change of direction probably tried to spin the engine the opposite direction... thus stalling it.

Usually it has nothing to do with fuel.

That is why it stalled. At one point in time, just long enough, the tires were at zero velocity with the clutch still engaged.

Bingo.

Posted: 10/11/2007 6:00:08 PM EDT

[#27]

So can someone tell me why when a cop PITs a suspect vehicle, it kills the engine?

Posted: 10/11/2007 6:04:49 PM EDT

[#28]

Fuel cut off switch?

Most newer cars have an automatic fuel cut off. So, when you crash you won't also burn. if its a Ford look behind the carpet on the wall of the trunk. Mash the button and Voila your car runs again.

Posted: 10/12/2007 5:44:27 PM EDT

[#29]

Quoted:

Quoted:
So how do you explain it with a fuel injected truck on wet grass?

High gear at slow travel speeds will make it REAL easy to stall a motor... So YES... even a fuel injected truck in wet grass.
Anything less than wet ice will have little trouble stalling a motor in a spin. Even with an automatic transmission.

Remember, the transmission selects gears based on driveshaft/wheel speed, not actual road speed.
If you are going forward at 60mph, you will likely be in a 1:1 gear like 3rd, or an OD 4th gear at .87:1 or so.
How much torque do you suppose is available at the wheels when you are in 3rd or 4th gear ? then try to overcome ZERO or negative road speed ?

I guess that makes sense.

[ARCHIVED THREAD] - I spun my car 180. It killed the engine...why?

General » General Discussion

Warning

Confirm Action

About AR15.COM

Stay Connected

Newsletter

Contact Us