Problem with motor start *HELP* :D

Levente · 10-12-2011, 07:55 PM

Hi guys i need your advices once again. Please help.

Problem is the following:

The electronic system self shutdowns the motor when i want to start it.

So i turn the ignition key and the moment the engine would start it just simply goes off with a BRRRRRRRR sound. today was the third time this happened since i bought the car (this year september).

For the first 2 cases i called the bmw mobileservice, they pluged in their laptop, reseted the electronics and woala engine started again, but they couldnt explain the cause. lol? So im asking you guys if you have any idea what the hell causing this problem?

The first case happened after 1 month i bought the car, at first i thought maybe because i left the car for 2 weeks in the garage and didint drive it, but after another 1 month it happened once again while i had a trip to Landsberg, i parked for about 20 minutes and then when i wanted to start the same shit happened. its a bit frustrating. please help

thanks in advance

shane@mbtech · 10-12-2011, 08:12 PM

Quote:

Originally Posted by Levente

Hi guys i need your advices once again. Please help.

Problem is the following:

The electronic system self shutdowns the motor when i want to start it.

So i turn the ignition key and the moment the engine would start it just simply goes off with a BRRRRRRRR sound. today was the third time this happened since i bought the car (this year september).

For the first 2 cases i called the bmw mobileservice, they pluged in their laptop, reseted the electronics and woala engine started again, but they couldnt explain the cause. lol? So im asking you guys if you have any idea what the hell causing this problem?

The first case happened after 1 month i bought the car, at first i thought maybe because i left the car for 2 weeks in the garage and didint drive it, but after another 1 month it happened once again while i had a trip to Landsberg, i parked for about 20 minutes and then when i wanted to start the same shit happened. its a bit frustrating. please help

thanks in advance

Have you tried your spare key.

Levente · 10-12-2011, 08:50 PM

Quote:

Originally Posted by lawsy

Have you tried your spare key.

yup i tried. and nope still dont work

mattCSLnut · 10-12-2011, 11:41 PM

Sounds like your alternator is giving up slowly (very common on the CSL) and you're not getting a full charge back to the battery. This usually happens around this time of the year as the days get shorter/colder and you start using more of the electrical components in the car, all at once, putting a greater demand on the alternator and the battery . Get a mechanic to do a full electrical test on the car including the alternator voltage output.

**cantfind1** · 12-12-2011, 04:36 AM

Sounds like you may have an earthing problem perhaps...... There is a earthing strap under the car which goes from the engine to the chassis this can sometimes rust/corrode.

If the earth is bad it causes the ecu to go into some strange mode, where you cannot restart the car until you reset adaptations using GT1 etc.

Worth a look.

**cantfind1** · 12-12-2011, 04:37 AM

Car should still start with a dodgy alternator as long as there is sufficient charge in the battery......

Levente · 13-12-2011, 08:47 AM

Many thanks for the suggestions. I better call the mobileservice again and check these things. How much Volt does a newly bought alternator have to produce? 14?

10-12-2011, 07:55 PM	#1
Levente S5 - Full Throttle Join Date: Nov 2011 Location: Germany, Münich Posts: 284 Casino cash: $2085	*Problem with motor start HELP* :D** Hi guys i need your advices once again. Please help. Problem is the following: The electronic system self shutdowns the motor when i want to start it. So i turn the ignition key and the moment the engine would start it just simply goes off with a BRRRRRRRR sound. today was the third time this happened since i bought the car (this year september). For the first 2 cases i called the bmw mobileservice, they pluged in their laptop, reseted the electronics and woala engine started again, but they couldnt explain the cause. lol? So im asking you guys if you have any idea what the hell causing this problem? The first case happened after 1 month i bought the car, at first i thought maybe because i left the car for 2 weeks in the garage and didint drive it, but after another 1 month it happened once again while i had a trip to Landsberg, i parked for about 20 minutes and then when i wanted to start the same shit happened. its a bit frustrating. please help thanks in advance __________________ www.dlevente3d.hu

10-12-2011, 11:41 PM	#4
mattCSLnut CSL Register Uber-poster! Join Date: Sep 2009 Location: Cambridge Posts: 6,460 Casino cash: $27763	Sounds like your alternator is giving up slowly (very common on the CSL) and you're not getting a full charge back to the battery. This usually happens around this time of the year as the days get shorter/colder and you start using more of the electrical components in the car, all at once, putting a greater demand on the alternator and the battery . Get a mechanic to do a full electrical test on the car including the alternator voltage output. __________________ UK CSL No.020 ... after 7 years of ownership I've now SOLD it !!!

13-12-2011, 08:47 AM	#7
Levente S5 - Full Throttle Join Date: Nov 2011 Location: Germany, Münich Posts: 284 Casino cash: $2085	Many thanks for the suggestions. I better call the mobileservice again and check these things. How much Volt does a newly bought alternator have to produce? 14? __________________ www.dlevente3d.hu

12-12-2011, 04:36 AM	#5
cantfind1 S5, Sport Off, DSC M-track Join Date: Oct 2009 Location: Sydney Australia Posts: 675 Casino cash: $6490	Sounds like you may have an earthing problem perhaps...... There is a earthing strap under the car which goes from the engine to the chassis this can sometimes rust/corrode. If the earth is bad it causes the ecu to go into some strange mode, where you cannot restart the car until you reset adaptations using GT1 etc. Worth a look.

12-12-2011, 04:37 AM	#6
cantfind1 S5, Sport Off, DSC M-track Join Date: Oct 2009 Location: Sydney Australia Posts: 675 Casino cash: $6490	Car should still start with a dodgy alternator as long as there is sufficient charge in the battery......