Wat do i need to inspect? we even nreplkaced new battery. we tried giving it a jump. still no working.. it cant5 be alternator cuss battery is fine. it seem to not crank so can iy be spark plug
Assume you have gas. BMW does not like to start or run if the battery voltage gets too low (for example sitting in the driveway unused. It does not take long with all the electrical drain(computer, security, etc.). A peculiar item about M cars is if the oil gets 3 quarts low, the engine wont start to protect the engine. Other less common camshaft sensor, crankshaft sensor, ignition coil pack, fuel filter, fuel pump. If it does not crank but battery is fine, check the starter. Turn the ignition to ON but not START then if you cannot hear the fuel pump humming, the fuel pump itself or a relay to it is probably bad. Using a rubber mallet, give a couple of sharp blows to the underside of the fuel tank and then try to start. If it starts, fuel pump is bad. Fuel pump is located under the back seat on the passenger side-easy to get to.
Wont crank?
or cranks robustly (the crankshaft spins fast) but wont start.
all cars that dont start one, all ran when new. etc.
what counts is the now. only.
you need to do the tests. all covered in the FSM or at alldata.com
i cant help you because you . cuz did not say crank or start? so......
1: test all fuses. (not just gandering, use a meter)
2: check battery voltage 12.6vdc rested.
3: if not cranking, wiggle the shilter (a/t) or clutch if m/T
if a/t? try cranking in Neutral. cranks now? bingo.
4: cranks ok, and fast so check spark/
ill end there, due to vast number of tests and no clear stated
symptoms.
ever give it a full tuneup (60,000 mile service schedule?) or this DECADE. if not why ask the spark plug question.
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Check the fuel pump
the fuel pump does not fix , no cranks. sorry, BUZZZZ,
that cures , cranks and not starts, and spark is good, and test fuel runs the engine for 3 seconds, so fuel pressure is next. LOGIC, use logic to diagnose. not guessing.
check for spark at each spark plug. (the classic test for otto cycle engines) if you have spark good, if not work backwards from there. 9 days old, i bet its fixed now.. huh?
a full battery is 12.6v no 10, or 9v, and stays above 10v cranking,
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SOURCE: battary light on , engine cut off car won't crank
sounds like it's your alternator, your alternator charges your battery and runs car once it is started. if you have a bad alternator your battery light will come on, and shortly after your vehicle will die, unable to restart without a jump. I would take your battery to autozone or an auto shop to have your battery and alternator tested.
SOURCE: 1995 bmw 318is new alternator battery dieing
check all the lighting on the car, IE: trunk light,glove box light, light under the hood, any small light make sure they shut off ,check to see if you have a phone charger left in the cig. lighter, radar detector ETC. any of those things can drain a battery over night quick.if you dont find anything wrong then you may have a short somewhere in the electric system... hope this helps you...
SOURCE: 1995 BMW 740i worked on lights while cd were on,
i think that this vehicle has a factory immobilisor ,and this is your problem ,dealer only
SOURCE: no crank
shorting to start motor will allow the motor to turn but the ignition system is still off.
try with key turned to ignition position.
suspect starter solenoid on starter motor.
suspect fuses maybe there is a fuse which has blown.
suspect ignition key switch maybe defective.
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