This happened a few days ago. I just drove out from a friend's place trying to access a street at a T-junction. As I got close to the end of the street which was very sandy, there was one little boy pushing a wheel barrow containing a jerrican of water. He was trying to enter a fenced compound through a gate thereby blocking the way. I now came out of my car to help him push the wheel barrow from the way. Behold my car started moving. The guy driving behind me shouted ''Hey your car is driving itself ooo''Apparently I left the car in drive position before coming out. I wish one nairalander was nearly to bring you the live video. Sorry oo, no video but it was a sight to behold seeing my car driving away without me!

Leave Hard drugs o

kilode100:
Leave Hard drugs o

Haba, hard drugs? No, no, no, far from it. I think it was the urgency of the situation. The little boy was blocking the way and a cue was begining to form behind me.

Henovy:

Haba, hard drugs? No, no, no, far from it. I think it was the urgency of the situation. The little boy was blocking the way and a cue was begining to form behind me.

The E-gbo is still doing you strong thing.. This must be grade 1 stuff

Henovy:
This happened a few days ago. I just drove out from a friend's place trying to access a street at a T-junction. As I got close to the end of the street which was very sandy, there was one little boy pushing a wheel barrow containing a jerrican of water. He was trying to enter a fenced compound through a gate thereby blocking the way. I now came out of my car to help him push the wheel barrow from the way. Behold my car started moving. The guy driving behind me shouted ''Hey your car is driving itself ooo''Apparently I left the car in drive position before coming out. I wish one nairalander was nearly to bring you the live video. Sorry oo, no video but it was a sight to behold seeing my car driving away without me!

If you leave your car having an auto transmission on drive and you leave the car without stepping on the brake pedal its normal for it to move itself. If its on park and the car moves then bro you might want to consult the oracle to know why those withches and wizard are still after your car

better thank God you didn't crash the car, or the car didn't get involved in an accident.
it's not funny bro.
A man I know lost his life as a result of this, the car pressed him against his gate, he had severe internal bleeding and died.(Not our portion, by God's grace)

I wonder what we Nigerians think, you were expecting someone do aa video recording shey, so we all cheer you and your super car, right? no wonder the other guy posted a commercial driver doing 170km/hr and all he could think of was to snap!.... smh

You should thank your God that you are here narrating this.

Henovy:
This happened a few days ago. I just drove out from a friend's place trying to access a street at a T-junction. As I got close to the end of the street which was very sandy, there was one little boy pushing a wheel barrow containing a jerrican of water. He was trying to enter a fenced compound through a gate thereby blocking the way. I now came out of my car to help him push the wheel barrow from the way. Behold my car started moving. The guy driving behind me shouted ''Hey your car is driving itself ooo''Apparently I left the car in drive position before coming out. I wish one nairalander was nearly to bring you the live video. Sorry oo, no video but it was a sight to behold seeing my car driving away without me!

And this carelessness of urs dt could have caused an accident is what is exciting u. Ur head really needs to b examined

mayor2013:


If you leave your car having an auto transmission on drive and you leave the car without stepping on the brake pedal its normal for it to move itself. If its on park and the car moves then bro you might want to consult the oracle to know why those withches and wizard are still after your car

It can happen most especially on cars with electronic trottle.

Those cars usually increase rpm when engine power consuming parts of the car is activated such as A/C, power steering, cooling fan and headlights.

If he left his car on hand brake pulled but not fully and the car running on A/C but compressor is clutch is not engaged at the moment he stepped out, the car can overcome the hand brake as soon as the clutch engages while he is not in the car. My office Toyota prado idles with ac off at 850rpm but as soon as AC engages it goes up to 950 and back down to 850 when it disengages.

The same thing happens when the steering is turned att idle.

So a car that is automatic and left at idle on drive can overcome the hand brake when rpm moves from 850 to 950 at AC clutch engagement.

Even on my 2003 accord, i usually feel the need to press the brakes harder when AC engages at idle and on drive. It has a cable activated throttle but somehow, engine rpm remains same during AC on or off but only moves during activation and deactivation but adjust itseelf back to 800rpm. I guess thats why no matter how good my engine mounts are, my friends 2008 accord on AC is more smoother because his rpm goes up with the with AC activation.

adanny01:


I can happen especially on cars with electronic trottle.

Those cars usually increase rpm when engine power consuming parts of the car is activated such as A/C, power steering, cooling fan and headlights.

If he left his with hand brake pulled but not fully and the car running on A/C but compressor is clutch is not engaged, the car can overcome the hand brake as soon as thr clutch engages while he is not in the car. My office Toyota prado idles with ac off at 850rpm but as soon as ac engages it goes up to 950 and back down to 850 when it disengages.


The same thing happens when the steering is turned att idle.

So a car that is automatic and left at idle on drive can overcome the hand brake when rpm moves from 850 to 950 at AC clutch engagement.

Not only on DBW. You might wana praticalise and feed me with the result

mayor2013:


Not only on DBW. You might wana praticalise and feed me with the result

It has happened to me but not like i was out of the car. In my case the car move while doors were opened, all i had to do was to quickly pull the hand brake harder and it stopped. This happen on my 03 accord. Driving my friends 08 accord, i usally feel need to apply more pressure on brake at idle when AC kicks in.

Rpm increase from 850 to 950 is well enough to get a car moving if hamdbrake is no pulled tight.

adanny01:


It has happened to me but not like i was out of the car. In my case the car move while doors were opened, all i had to do was to quickly pull the hand brake harder and it stopped. This happen on my 03 accord. Driving my friends 08 accord, i usally feel need to apply more pressure on brake at idle when AC kicks in.

Rpm increase from 850 to 950 is well enough to get a car moving if hamdbrake is no pulled tight.

No dispute about what you said. Your 03 accord throttle actuator is controlled mechanically are you aware?

adanny01:


It can happen most especially on cars with electronic trottle.

Those cars usually increase rpm when engine power consuming parts of the car is activated such as A/C, power steering, cooling fan and headlights.

If he left his car on hand brake pulled but not fully and the car running on A/C but compressor is clutch is not engaged at the moment he stepped out, the car can overcome the hand brake as soon as the clutch engages while he is not in the car. My office Toyota prado idles with ac off at 850rpm but as soon as AC engages it goes up to 950 and back down to 850 when it disengages.

The same thing happens when the steering is turned att idle.

So a car that is automatic and left at idle on drive can overcome the hand brake when rpm moves from 850 to 950 at AC clutch engagement.

Even on my 2003 accord, i usually feel the need to press the brakes harder when AC engages at idle and on drive. It has a cable activated throttle but somehow, engine rpm remains same during AC on or off but only moves during activation and deactivation but adjust itseelf back to 800rpm. I guess thats why no matter how good my engine mounts are, my friends 2008 accord on AC is more smoother because his rpm goes up with the with AC activation.

it got nothing to do with a electronic throttle

its all about the automatic gearbox when idle and in drive the car will move especially when it flat and no handdrake reason being that the idle speed has torque that is making the torque converter engage the gearbox therefor the car moves (this happens inside the torque converter)

Henovy:

Haba, hard drugs? No, no, no, far from it. I think it was the urgency of the situation. The little boy was blocking the way and a cue was begining to form behind me.

queue

ZIMDRILL:


it got nothing to do with a electronic throttle

its all about the automatic gearbox when idle and in drive the car will move especially when it flat and no handdrake reason being that the idle speed has torque that is making the torque converter engage the gearbox therefor the car moves (this happens inside the torque converter)

I tire. If only car manufacturers have started consulting oracles before and after production of cars

mayor2013:


No dispute about what you said. Your 03 accord throttle actuator is controlled mechanically are you aware?

These are my words above

Even on my 2003 accord, i usually feel the need to press the brakes harder when AC engages at idle and on drive. It has a cable activated throttle but somehow, engine rpm remains same during AC on or off but only moves during activation and deactivation but adjust itseelf back to 800rpm. I guess thats why no matter how good my engine mounts are, my friends 2008 accord on AC is more smoother because his rpm goes up with the with AC activation.

adanny01:


These are my words above

We are only trying to let you know irrespective of a DBW or DBC. As long its an automatic transmission if put to D without pressing the brake pedal the car would move

ZIMDRILL:


it got nothing to do with a electronic throttle

its all about the automatic gearbox when idle and in drive the car will move especially when it flat and no handdrake reason being that the idle speed has torque that is making the torque converter engage the gearbox therefor the car moves (this happens inside the torque converter)

Probably you didnt understand my point.

Leaving a car on idle that is auto trans on drive and on handbrake may not be much of an issue. What i am saiying is that most cars with electronic throttle are programmed to increase rpm when certain loading is added on the engine such as AC, power steering etc. The torque a driver left his car will ultimately increase when those loads come on automatically while the driver is not in the car. The increase in torque can over come the force of the handbrake especially if it wasnt fully pulled.

I gave example of the toyota prado in my office that has an rpm of 850 at idle but once AC kicks in, idle will increase to 950rpm and comes down to 850 once the compressor deactivates. Though the prado is manual, if it were auto, the increase lf rpm from 850 to 950 will increase torque tremendously and if it were in the op's case could move the car. Forces of momentum can keep the car moving even after the load must have disengaged and rpm drops back to previous level.

My case is that the torque remains constant at same idle but once a load is added to the engine such as AC and power steering, electronic throttle is design to increase rpm. The two cars i have access to with electronic throttle (06 prado and 08 accord) both experience increase in rpm once A/C, PS, Headlights, power windows, sunroof turns on at idle. If the car is in drive, you will feel more torque. My own car an 03 accord has a cable throttle, the rpm surges up or down for few seconds when such loads are turned on but normalises to a constant 800rpm. It has a downward surge at loading instant then neutralises and has an upward surge when load goes off then neutralises.

When you put my car on drive, rpm drops to 650 but no matter what, my friends 08 accord never goes below 800rpm and has no downward surge but only upwars surge upon loading.

I hope you understand now.

[quote author=ogawisdom post=40913934]

And this carelessness of urs dt could have caused an accident is what is exciting u. Ur head really needs to b examined[/quote
Did you really read the post properly. If you did you will realize that it was a mistake done probably due to haste to clear the way. There was nothing that suggested excitement, bro. Such posts are for us to learn and probably prevent future accidents and other mishaps. You can actually be more courteous than that in your comments.

pek:
queue

Thanks bro. for the correction. We call that kind of typo ''key board wickedness''

adanny01:


Probably you didnt understand my point.

Leaving a car on idle that is auto trans on drive and on handbrake may not be much of an issue. What i am saiying is that most cars with electronic throttle are programmed to increase rpm when certain loading is added on the engine such as AC, power steering etc. The torque a driver left his car will ultimately increase when those loads come on automatically while the driver is not in the car. The increase in torque can over come the force of the handbrake especially if it wasnt fully pulled.

I gave example of the toyota prado in my office that has an rpm of 850 at idle but once AC kicks in, idle will increase to 950rpm and comes down to 850 once the compressor deactivates. Though the prado is manual, if it were auto, the increase lf rpm from 850 to 950 will increase torque tremendously and if it were in the op's case could move the car. Forces of momentum can keep the car moving even after the load must have disengaged and rpm drops back to previous level.

My case is that the torque remains constant at same idle but once a load is added to the engine such as AC and power steering, electronic throttle is design to increase rpm. The two cars i have access to with electronic throttle (06 prado and 08 accord) both experience increase in rpm once A/C, PS, Headlights, power windows, sunroof turns on at idle. If the car is in drive, you will feel more torque. My own car an 03 accord has a cable throttle, the rpm surges up or down for few seconds when such loads are turned on but normalises to a constant 800rpm. It has a downward surge at loading instant then neutralises and has an upward surge when load goes off then neutralises.

When you put my car on drive, rpm drops to 650 but no matter what, my friends 08 accord never goes below 800rpm and has no downward surge but only upwars surge upon loading.

I hope you understand now.

well i dont know why you brought the subject of AC

becoz with or without AC on, on a flate surface with no hand brake being ON and in gear aka drive an automatic car will move on, but this would be only when the car has less load

so the changing rpms due load eg headlight on, AC on etc wasnt really necessary (to me) when trying explain why the car moved

mayor2013:


We are only trying to let you know irrespective of a DBW or DBC. As long its an automatic transmission if put to D without pressing the brake pedal the car would move

Thats a fact i know. I am also trying to explain to you that throttle control design in some cars increases rpm in certain conditions that will send more torque to the auto transmission.


Op left his car and it was moving when he left. But during the time he was away something happened (probably more torque) and the car started moving. Its simple principle of inertia. A body that has come to rest will remain in such condition until an external (in this case additional) force acts in it. That additional force is what i am struggling to describe.

Like i said, i have experienced it but in my case i had not left the car. All i did was to pull the hand brake harder and it stopped. In my case, the A/C compressor activated and just that moment the car started moving.

ZIMDRILL:


well i dont know why you brought the subject of AC

becoz with or without AC on, on a flate surface with no hand brake being ON and in gear aka drive an automatic car will move on, but this would be only when the car has less load

so the changing rpms due load eg headlight on, AC on etc wasnt really necessary (to me) when trying explain why the car moved

I think i have explained the A/C part a lot of times already.

I think you should imagine the scenerio harder.

The op couldnt have stepped out of his car while it was moving which we all know an auto will keep moving. The op left his car and am sure it wasnt moving. My assumption is that he probably forgot the car in drive, A/C on and pulled the hand brake but not strong enough. So the hand brake was good enough to stop the car but when the A/C compressor activates and added more torque enough to overcome the partially pulled hand brake.

I cant do more explanations or keep repeating the same explanation over and over.

Modification:

I went back to read from the op again. He mentioned he left his car in drive so its not my assumption. However, he mention the road was sandy, with this info he might not have pulled his hand brake but we all know sand opposes movement alot. So relace where i mentioned handbrake to sand and the assumptions and scenerio still stands. Its also possible the car just over came what stopped it from movng in the first place.

adanny01:


I think i have explained the A/C part a lot of times already.

I think you should imagine the scenerio harder.

The op couldnt have stepped out of his car while it was moving which we all know an auto will keep moving. The op left his car and am sure it wasnt moving. My assumption is that he probably forgot the car in drive, A/C on and pulled the hand brake but not strong enough. So the hand brake was good enough to stop the car but when the A/C compressor activates and added more torque enough to overcome the partially pulled hand brake.

I cant do more explanations or keep repeating the same explanation over and over.

Modification

through my experience as long there is no resistance, eg the car being a on steep angle or front wheels facing either side etc an automatic will always move with or without the ACC ON, for sure we know that the handrake wasnt on or it doesnt work

so long the there is no load in the car to counter weight the rpms, no handrake on and the surface is flat an automatic will move even when AC is off

your theory is also correct but even without something making rpms go high when conditions are good the car will move

ZIMDRILL:


through my experience as long there is no resistance, eg the car being a on steep angle or front wheels facing either side etc an automatic will always move with or without the ACC ON, for sure we know that the handrake wasnt on or it doesnt work

so long the there is no load in the car to counter weight the rpms, no handrake on and the surface is flat an automatic will move even when AC is off

your theory is also correct but even without something making rpms go high when conditions are good the car will move

Agreed sir.

adanny01:


Agreed sir.

the other simple reason is that, when the car idles for too long while in gear it build up force that will add more contact to the blades inside the torque converter and making more contack grip

so thats why you find that when someone leaves the car idling (with right conditions) the few secs eg 30 secs it doesnt move but maybe 30 more secs later the car starts moving because the oil pressure build up inside and more grip on the spining blades inside the converter and then its able to turn the gearbox and the car moves

all caused by building up of pressure without even increasing of rpms