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Old 08-07-2009, 02:21 PM   #1 (permalink)
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car wont start after water in brake booster pan

I have a 2000 528i with 107k. Last week it rained extremely hard for a few days and my daughter parked my car face down on a slope. 60 mins later she tries to start the car and it's blowing white smoke out the tail , idling very badly and would not move when you put it in gear. Eventually it shuts off and is very hard to restart. after about 12 starts the white smoke disappeared. the car shut off and now will not start (engine turns over and sounds like it's trying to start). i've changed the plugs, the old ones were in good shape with no oil or soot, and still cannot start. I did notice there was a lot of water in the pan where the brake booster is. I noticed a few days before, that upon the first few presses of the brake I heard a whooshing sound, and it felt like something was rubbing against sandpaper. is there a chance I have water in my vacuum system that's preventing the car from starting?
I did check the SES codes. i get the p0300. it listed all 6 cylinders as mis-firing. i also got a code for a crankshaft position sensor. I did replace the camshaft sensors (in and out) last winter. could someone tell me (bmw dealer gave me the wrong parts when i was having problems with the intake camshaft sensor, thats how i ended up changing in and out sensors) that there is a difference between the camshaft sensor and crankshaft sensor. I think that would be my next step in trying to get my baby back on the road.
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Old 08-08-2009, 06:52 AM   #2 (permalink)
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The crankshaft sensor is located in the side of the bell housing of the gearbox, held in by a hex bolt, you cant miss it really obviously it has wires coming from it and yes it would cause the engine not to start.

I stepped in a plate of Pasta the other day - now I have to worry about my Carbonara footprint!
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Old 08-08-2009, 10:23 AM   #3 (permalink)
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Years ago my father had a volvo esate v6 petrol and that would often not start or would drive ok then proceed to run rough.

The cause in this case was a leaking water pump that let coolant run under the manifold runners (v6 engine) and then proceed to drown the crank sensor wiring,this fault finally emerged after much head scratching as to why the car would never start and run properly from cold when it had been parked facing uphill on a slope.

The water in the pan wherever it is located may be the problem so trace any drain holes and see if they are full of leaves and rubbish.

Does the ecu live there ??
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Old 08-10-2009, 09:49 AM   #4 (permalink)
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i did remove all the water from the brake booster pan and removd all the water out of the vacuum syste,m. The brakes do not have that whooshing noise anymore. I did get the car restarted after clearing all the codes and disconnecting the battery. seems the gas gause wqs not regitering properly, so i added a few gallons of gas. that was one problem. the other is the MAF sensor. the car will not run while that is connected. Once disconnected, the car runs fine. I am now looking for a new MAF. Is the Crabkshaft sensor in the front of the block. I know i have 2 camshaft sensors (intake.exhaust ) that are in the front.
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