disconnecting battery on 97m3?..

bmwmpwr · #1 (**permalink**) 06-13-2004, 08:01 PM

i just bought a 97 m3 and disconnected the battery so i could take out the amp that was in the back now the car wont start, it turns but wont turn over fully, someone said that when disconnecting the battery the computer resets and the car wont start true? help bmw will charge so much!

SG_M3 · #2 (**permalink**) 06-13-2004, 08:24 PM

Not true at all. If you reconnect the battery, the car should start just fine.

M-avant · #3 (**permalink**) 06-13-2004, 08:34 PM

did your battery get discharged? sounds like its out of juice

Scho · #4 (**permalink**) 06-13-2004, 09:39 PM

clean the terminals and retighten the cables.

bmwmpwr · #5 (**permalink**) 06-14-2004, 05:35 AM

Quote:

Originally Posted by M-avant

did your battery get discharged? sounds like its out of juice

no because i put a diffrent battery in the car after the first one didint work. i am 95% sure the car isnt getting fuel and i never had a hard time starting the car before hand plus the car just went in to bmw for the 60000 mile inspection and they said the car was perfect, could the fuel pump have gone so fast like that?

00Parker00 · #6 (**permalink**) 06-14-2004, 06:04 AM

If your engine is not turning over the whole way its definately not a fuel problem. Its probably a bad battery or faulty cables or possibly a bad starter. If it is turing over fine take a hammer and LIGHTLY tap the fuel pump that usually bumps it going if it a bad fuel pump. Disconnecting the battery does reset the computer but the worse thing that could happen is that you would have some drivability issues and you might have to go through a relearn procedure.