5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
Once in a while I have a problem starting my 1995 540I it happens when the car is both cold or warmed up.If I wait 10 or so minutes the car normally starts up .Once in a while when i turn the ingintion key nothing happens makes me wonder if i totally reset the key position .What can the problem be is this a common problem in 95 5 series
does crank and just not start? or it does not crank? if it does crank, and does not start, immediately after check your exhust for unburnt fuel smell or fumes. if it has unburnt fuel fumes, check your vacuum hose, and other engine area for leaking air
when u crank the car, step out and check the exhust for the smell of unburnt fuel!! if u do, look for a leak in your vacuum hose. its on the fuel rail on the side of the hose that returns fuel to the tank. it should be a small air hose pipe. check its not broken.
on other hand check your fuel pump relay!!! it may have delayed action syndrom (whatever that is)
I turn the key and there's no lights in the cluster. Radio and external lights work. Car won't start. Starter runs but fuel pump is not.
Turn the key on and off a few times until the cluster ligths come on and car will start like nothing happened.
I checked so far;
replaced the pump relay; no change
fuel pump; I wired a meter to it and saw that there's no voltage when in trouble; hence pump is fine.
Maybe you can run theses checks 95540guy.
I haven't found the actual trouble yet but will keep searching...
suspecting the ignition key barrel...
your key (or starter reley) module is either lose or faulty. when u turn key, it should complete the circuiu for the ignition. quick check... turn the key on (if lights do not come on) and crank the car from the engine bay (requires someone who knows how like a mech) if the car starts, the problem is at the key. if it does not start, check your ignition relay. (BE CAREFUL DO NOT HARM YOURSELF IN THE PROCESS. U COULD LOSE AN ARM OR SIZABLE AMOUNT OF FLESH AND BLOOD IF U CONTACT THE FAN) BE WARNED. its most likely your key barrel
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