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3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d. is the premier BMW Forum on the internet. Registered Users do not see the above ads.
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Old 09-12-2004, 09:10 AM   #1 (permalink)
Join Date: Aug 2004
Location: UK
Posts: 6
RICK_E46 is an unknown quantity at this point
I have a 325 se coupe with quite high mileage and the car occasional stalls.
On moving off from stand still, I put the clutch in first gear then rev the accelerator, unless I over rev the car to move off the rev counter needle will just drop to zero and the car will stall, this happens a few more times, then I leave the car for a minute then it works fine and will be ok for what it seems to be every time I refuel.

Does anyone have any idea what this maybe, maybe something needs cleaning, or replaced?

As its getting quite dangerous when I was making a slow turn the car stalled but as the engine is very quite didnít even noticed tried to carry on turning the wheel round the bend but it locked and could have been a serious accident as I went onto the other side of the road..
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Old 09-13-2004, 09:25 AM   #2 (permalink)
Join Date: Jun 2004
Posts: 2
gxsolace is an unknown quantity at this point
As long as your car is moving, it won't stall. How exactly are you taking off from a stand still? Assuming that there's a relatively healthy clutch/flywheel in your car, are you...

1. Reving the engine high and then dropping the clutch aggressively (meaning just a clutch pedel let go at high RPM) and while at the same time letting your foot off the gas as you drop the clutch?

2. Reving the engine to around 1K to 1.5K RPM and letting the clutch go while doing the same thing as 1 (ie. not keeping the gas down).

3. Keeping RPMs around 1K to 1.5K while sliding in the clutch and slowly applying more throttle.

In some cases, situations 1 and 2 will cause the car to stall because there isn't a continuous amount of RPM. Because your car is on a standstill, and it's quite heavy, dropping the clutch without a continuous throttle delivery, isn't enough power to get the car to move sufficiently enough to keep engine speeds from dipping below 500 RPM. Although there is a sudden jolt, the weight, drag, and sudden loss of power will contribute to a stall.

You don't have to rev your engine to high RPM to get it off a still. Just keep your foot on the throttle to around 1 to 1.5K RPM and slowly let go of the clutch. As the clutch catches the flywheel, your engine speeds will dip slightly. Try to maintain > 1K RPM and you should get your car moving smoothly, without jerk and avoid random stalling. Don't shoot for >2.5/3K RPM or you risk wearing the clutch faster and you'll cause a yank motion on your car (unless you want that).

Also, considering that you said you have high mileage on your car, how high is high exactly? And if you haven't had the clutch assembly replaced in a few years, I would definitely check the state of its health out at this point. Your stalling could be that the clutch is slipping - not enough clutch grip and slides on the flywheel - and as you let go of the throttle thinking that the clutch is engaged, it may infact be slipping and when it does engage, you no longer have enough engine speed and the car stalls.

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Old 09-14-2004, 04:15 PM   #3 (permalink)
Join Date: Sep 2004
Posts: 3
4tunesfool is an unknown quantity at this point
I had this problem with my 330 (one of many) and it was rectified by replacing the Cam Sensor. It was something that showed up on the diagnostic so it was an easy fix.

It was really intermittant, but when it happened it would notmally happen a few more times straight away.

Hope that helps.

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Old 09-16-2004, 12:51 PM   #4 (permalink)
Join Date: Aug 2004
Location: UK
Posts: 6
RICK_E46 is an unknown quantity at this point
Thanks for your replies

i think the chances of the problem are closer to being like 4tunesfool. As i have driven for many years now on other vehicles and never had a problem like this. The mileage is around 98k but not from me as only had the car a month, so may need to get the engine checked out. Are there any parts I should pay particular attention too? i.e. drive chain or do they last for a long time etc?

Where about is the cam sensor located? is it something that is easily changed or would i need to take it to a professional?
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