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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 04-25-2011, 12:54 PM
ngrich ngrich is offline
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HELP !!! 03 745Li won't start

my 745Li all the sudden won't start, it was trying to crank, but then it got weaker and weaker, and after a few more try on press the start button, it totally gone dead now. I though the issue may be the battery and have AAA come and charge the battery directly at the trunk but no luck . Any other suggestion on troubleshoot before I point the problem to the starter ? My car do have problem with oil leak, not sure if the oil got to the starter !!! : (
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  #2  
Old 04-25-2011, 02:51 PM
Keif Keif is online now
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Jump it using jumper cables hooked up to the posts in the engine compartment -- the negative post is on the passenger shock tower and the positive is a few inches toward the engine from there.
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  #3  
Old 04-25-2011, 06:21 PM
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USALEXUSBMW750 USALEXUSBMW750 is offline
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looks like fuel pump
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  #4  
Old 04-26-2011, 05:21 PM
ngrich ngrich is offline
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Battery non issue as tested. Fuel pump ? how do I diagnose it ?
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  #5  
Old 04-26-2011, 05:27 PM
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MOPAULY MOPAULY is offline
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put a pressure gauge on the fuel rail is what you would do on a normal car, not 100% sure if that applies here though
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  #6  
Old 04-26-2011, 05:34 PM
ngrich ngrich is offline
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What do you think Keif ? I am kind of lean toward starter; but people tell BMW's start last longer then you think. Plus, getting to the starter take some work.
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  #7  
Old 04-26-2011, 06:12 PM
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USALEXUSBMW750 USALEXUSBMW750 is offline
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how it can be starter if it crank? It can be 2 problems fuel of electronic, start with checking fuel first its easier and cheaper,to check the fuel pump lay down under the car close to fuel tank and ask someone to push start without brake pedal then with it if you hear noise from fuel tank then your pump is working if not check fuse first, ask Keif if this car has one for pump, he knows, if not the pump try to check for any error code
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  #8  
Old 04-26-2011, 06:17 PM
ngrich ngrich is offline
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there is no cranking at all, no error codes are thrown and iDrive, dashboard and radio are all on.
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  #9  
Old 04-26-2011, 06:59 PM
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USALEXUSBMW750 USALEXUSBMW750 is offline
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"it was trying to crank, but then it got weaker and weaker" means your battery went down?
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  #10  
Old 05-21-2011, 09:24 PM
Hpiracer Hpiracer is offline
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Hi Guys:

Fuel pressure may be the problem too. Many suggest change the fuel pump. My car had trouble starting too and would idle rough. I changed my camshaft sensors and crank sensor, fuel filter, and eccentric sensor only to find out it was a fuel rail pressure problem. In your case, it could be a loose injector connection to the fuel rail. The retainer clips may not have the injector fully secured in place. The o-rings get worn or damaged, especially if the fuel rail and injectors have been removed recently. Removing the fuel rail unseating the o-rings to inspect will require new o-rings upper & lower to re-seat properly and pressurize properly. If there is failure at the fuel rail on re-installation, misfire codes tend to be multiple cylinder and possible individual cylinder misfire codes. Once you inspect the retainer clips, and replace the o-rings, don't forget to clear the OBD fault codes before re-starting the engine.

Regards,

HPIracer
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  #11  
Old 05-21-2011, 10:03 PM
ngrich ngrich is offline
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It was the starter and replace it with new one carry two years warrenty parts and labor.
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  #12  
Old 06-10-2011, 01:02 PM
jrock1277 jrock1277 is offline
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where was the starter
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  #13  
Old 06-10-2011, 01:24 PM
ngrich ngrich is offline
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It is right above the exhaut manifold; however, the axis will be on the starter's way you will need have the right tool to support the axis as you will need to losen it to get the starter out. I end up paying my indy shop to do it and took them 9 hours for the whole job.
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  #14  
Old 06-10-2011, 01:27 PM
jrock1277 jrock1277 is offline
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thanks man
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  #15  
Old 06-11-2011, 11:15 AM
Mamidee Mamidee is offline
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Hey everyone, my 02 745 won't start either...tried to get it towed, but couldn't get it into neutral. Waiting for another truck to come get it, now. it cranks but doesn't fire. Question for ngrich: you said it was your starter? My husband thought that it wouldn't crank if it was the starter...he was thinking the fuel pump or bad fuel from costco (I just recently put Costco gas-usually put chevron). Just curious...what what your cost to replace the starter?
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  #16  
Old 06-11-2011, 05:53 PM
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MakaveliFaison MakaveliFaison is offline
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I just had same problem also. Mine was fuel pump. After I replaced fuel pump I had to clear a ews error that was preventing my car from starting. Look at my thread call car died to see if you have similar symptoms.
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  #17  
Old 06-11-2011, 05:57 PM
Mamidee Mamidee is offline
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Thanks for your reply...what was the cost for your fuel pump? I'm going to try to find your post.
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  #18  
Old 06-11-2011, 06:56 PM
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Its just under 400 for the rebuild kit at the dealer. I got the whole thing for 100 though from someone I know locally.
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  #19  
Old 06-11-2011, 08:28 PM
Mamidee Mamidee is offline
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Cool, thanks for the reply. I will find out on Monday what the diagnosis is...
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  #20  
Old 06-16-2011, 09:38 PM
ngrich ngrich is offline
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Sorry for the late reply. I was in Florida all week for my vacation, hopefully, you would have everything figure out by now.
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  #21  
Old 06-26-2011, 09:33 PM
Mamidee Mamidee is offline
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Hi there, well...they tested it and found no codes. Then I got a phone call saying that it didn't have any gas! I had just filled the car up earlier that week, and it still had a half a tank left. He said he put gas in it and it started just fine. when I left the shop, I went straight to the gas station, filled it up and it only took 10 gallons to fill up. I have no idea what the problem was... But it's fine for now. I'm thinking maybe a faulty sensor?? He said if it happens again I can bring it back to him.
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  #22  
Old 01-13-2013, 11:33 AM
jesussanchez jesussanchez is offline
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Unhappy re

I have a bmw 745li and it wont start i am not geting any fire to spark plugs or power fuel pump at all the car was in an accident idk if that matters plz help.
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  #23  
Old 01-13-2013, 11:34 AM
jesussanchez jesussanchez is offline
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02 bmw 745li
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  #24  
Old 10-10-2012, 07:53 AM
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***CCCP*** ***CCCP*** is offline
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Car does not start after replacing alt.

Hey all. Well as all of u know my alternator died. Its been replaced couple weeks ago. After replacing, car didnt want to start. We thought its integrated supply module so replaced that as well. Nothing changed. Any idea?
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  #25  
Old 10-10-2012, 09:33 AM
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wjjklj wjjklj is offline
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I have a power module that I will sell you cheap if you want to try that.
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