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  #1  
Old 06-09-2019, 03:29 PM
GregHole GregHole is offline
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Problems getting my new F02 750Li running

Hey guys, I finally decided to purchase a f02 project car and had it towed to my shop. I spent the whole day working on the car and am starting to feel like there is something either sapping power or there is an electrical problem somewhere. When I hook up a jump box and try to start the car I can hear a nasty grinding sound which I believe is the starter. I want to emphasize that I can only get the starter to make the grinding noise when a jump box is hooked up to the car. I took a battery out of my e38 7 series, charged it and as soon as I connected it I heard a relay in the rear fuse box clicking on and off. Before the battery was hooked up to the car it was at ~12.3 volts. When I connected the battery it dropped down to ~6 volts and the AC started turning on and off by itself. The battery soon after drained to the point that all the electronics shut off. I then completely removed the battery from the car and hooked up my jump box to the terminals in the front of the car at 20amps and all the electronics functioned for the most part and the starter made the same grinding noise. I feel that I should also mention that while activating certain power consumers (i.e. rolling up the windows) an audible power noise can be heard almost like something high voltage is being powered up (possibly through the speakers).project to work on. Any input would be appreciated.
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  #2  
Old 06-09-2019, 03:51 PM
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Ridin'Dirty Ridin'Dirty is offline
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Are you familiar with this website?:
https://www.newtis.info/tisv2/a/en/
Put the last seven digits of you car's VIN in to find info specific to your BMW.
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  #3  
Old 06-09-2019, 03:56 PM
GregHole GregHole is offline
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Yes, I have used newtis before, I couldn't find anything useful to fixing this particular problem
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Old 06-10-2019, 09:12 AM
Robin750 Robin750 is offline
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Does the E38 use AGM batteries? If it's a standard lead-acid, the current draw may be too much for it to handle. Get an AGM battery and see if that makes any difference.

Do you have ISTA and are there any faults?
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Last edited by Robin750; 06-10-2019 at 09:13 AM.
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Old 06-10-2019, 09:31 AM
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Doug Huffman Doug Huffman is offline
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Quote:
Originally Posted by GregHole View Post
Yes, I have used newtis before, I couldn't find anything useful to fixing this particular problem
The NewTIS.info learning curve is steeper than an F02 project car.

If you canít find the solution there then the problem is not understood and well posed.
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Old 06-10-2019, 03:28 PM
isstatu1 isstatu1 is offline
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Was it in an accident? Doesn't one of the battery terminals blow when the car is in an accident? I'd check that.
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  #7  
Old 06-11-2019, 08:37 AM
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BeemerGuy BeemerGuy is offline
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Location: Raleigh area, NC, USA, Earth
 
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These cars require massive batteries that have a good charge. I suspect that the jump box as well as the borrowed E38 battery are not up to the task. Buy a new, properly sized battery for your car, make sure that it is fully charged, and start over.

I also wonder what it is about the car that originally made it a "project car" and allowed you to buy it so cheap. Hopefully it's not a flood car.
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Old 06-11-2019, 10:49 AM
GregHole GregHole is offline
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Mein Auto: e38 740i m sport
Turns out engine is siezed and crank hub cant rotate all the way around. What should I do?
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Old 06-11-2019, 05:36 PM
chinb7 chinb7 is offline
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Start shopping for an engine.
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  #10  
Old 06-12-2019, 04:11 AM
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BeemerGuy BeemerGuy is offline
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Quote:
Originally Posted by chinb7 View Post
Start shopping for an engine.
Fortunately the N62 V8 went into a lot of cars, 5,6,7 both in cars and sav models. So there should be plenty our there in salvage land.

The brave and adventuresome would get a crate American V8 with a six-speed manual and convert that thing into a beast.

Best of luck. Hopefully you got a good enough deal on the "project" so that you can still come out OK.
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Old 06-12-2019, 09:06 AM
Robin750 Robin750 is offline
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Quote:
Originally Posted by BeemerGuy View Post
The brave and adventuresome would get a crate American V8 with a six-speed manual and convert that thing into a beast.
If conversions were possible, I think a lot of N63 owners would have seriously considered dropping in an N55.
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Old 06-13-2019, 08:01 PM
HerbP HerbP is offline
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Originally Posted by GregHole View Post
Turns out engine is siezed and crank hub cant rotate all the way around. What should I do?
Since you need to buy an engine, make sure it is a 2014 or higher engine. There is no sense in buying a bad motor, then have the same problems. I would guess you are looking around 10k for a good engine. I believe there are only 2 machine shops in the country that can bore the block. There is a company up in Michigan somewhere that sells rebuilt engines with a warranty, & I would suggest that route. Somewhere around 10k 2 years ago.
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