Some time the conecti
Does the engine turn over? I guess yes if you get a spark. . But if not, Sometime the connections at the battery can work one second and then not in the next. Always disconnect and clean the connections and battery posts when having battery issues even if they look clean. Wipe a thin film of petroleum jelly on the metal components to hinder corrosion if you have some. You can buy a little travel tube to keep in the toobox.
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The computer needs 12V in order to start.
SOURCE: 98 BMW 740iL won't start?
If it is an automatic try turning the ignition on and moving the shifter all the way down and place it in neutral to start it if not then put it in park and make sure it is all the way in good luck! Ed
SOURCE: Battery on BMW 740i keeps dieing
you need to disconnect one side of the battery, put one lead from an ampmeter on the battery post you have disconnected and the other ampmeter lead on the cable you took off the battery. with nothing turned on on the car , all doors closed the reading on the ampmeter should be no higher than 0.17 amp, if it reads a lot hgher go to the fusebox and remove one by one all the permanent supply fuses looking at the reading every time until you find the circuit that is causing the high reading, this will be the drain. alot of the time it can be central locking system playing up, boot light, glove box light not switching off, stereo wired wrong. hope this helps.
SOURCE: BMW 320i is using 5L of oil every 1000miles no
Try using an automotive dye in the oil the oil has to be going somewhere the dye should reveal the loose gasket or loose oil plug in which the leak may only occur at speed under pressure and not present when stopped
SOURCE: BMW 323i no power in the car at all, not the battery, not the alt
I had this same problem with my 94 525. Both of my battery chargers indicated battery was fully charged. I took the battery to Autozone and they said it only had 3 volts and they would charge it. They hooked up thier charger and it also said it was fully charged! They concluded the battery was bad and a new one fixed everything.
SOURCE: when should i change the cambelt on my 1990 320i
the change interval on this belt is 60,000 miles or 100,000 KM, remember this engine WILL BEND VALVES IF THE BELT BREAKS.
Testimonial: "thanks very much pal"
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