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745i4k 10-23-2012 06:14 PM

2004 745I starting issues
Hi guys,

Got a questions for anybody that can give me some input, highly appreciated.
I have a 04 745 I , with 149,000 miles, bought it with 65k a few years back and been doing my own maintanance on her since.

A little background:
So my starters been acting up for the last 6 months, several times a month i would try to start and would get nothing (no cranking), just a single click sound that seemed to be comming from the glovebox. after several attemps of removing key she would fire up normally, so I assummed the starter was just getting stuck. This past Friday I get in the car after work crank her up she starts right up then dies after 5 seconds WTF, crank her again she starts up and dies after a few seconds. I try a third time and now she just wont fire up (she cranks just wont turn over.

I asked around and was told to check the pressure on the fuel rail, whitch I did and im getting like 2.89 bar when i try to crank, then I remove the key and like 30 seconds later the gage spikes to 3.5 bar then back down to 2.89

Fuel pump?

Power module?

crank sensor?

Any help or ideas will be highly appreciated.

Khabar 10-23-2012 06:22 PM

check your fuel pump, remove back sit, disconnect pump and put wire from spare battery to pump. I think purple and brown (ground ) wires

745i4k 10-24-2012 09:35 PM

I got 4 wires going to the pump , 2 thick wires: brown w/yellow stripe and purple w/black stripe. Then I got 2 skiny wires that look black.

so which one do I connet the battery (+) lead to

745on22s 10-25-2012 07:57 AM

I have the same yr and had the same problem. Id park go inside a store come out and car would click 1s then nothing. After much reserch i replaced the integrated power supply and ive had a year of no worrys!

alpinaman24 10-25-2012 08:23 AM

yea fuel pump is a diffrent issue from what your explaining

eighter your starter is no good or like ^he said integrated supply module which controls the power going to the starter

745i4k 10-25-2012 03:37 PM

Thanks alot guys for your sugestions

745i4k 10-25-2012 03:40 PM

try that again.

Thanks allot guys for your suggestions/reply's,

I guess its not too bad like $130, i'm going to try that because she's been out of commission for two weeks!!

Cross my fingers, keep you guys posted.....

El Ninis 12-03-2012 10:03 AM

Hi there 745i4k I'm having the same problem you had with your ride I got a 2004 745li with 143,000 and would like to know if replacing the integrated power supply module worked for you. Thanks in advanced:)

palin 12-03-2012 07:30 PM

I have a 2004 BMW 745i. and exited the code p0491 and it will change the air pump and return the code, help: Cry:

745i4k 12-05-2012 08:20 PM

Well guys she's still sitting in my drive way,
Ordered a new integrated power supply and still no start-up:mad:

alpinaman24 12-06-2012 11:44 AM

did you ever check the starter like i was saying ?

SuperSnoop 12-06-2012 03:13 PM

Try tapping the starter with a broom handle. It's at the back, bottom of the engine on the passenger side.

Jahlive 04-28-2013 12:00 PM

did you ever get this fixed I'm having the same issue. Thanks

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