Very long (5-10 second) cranks when starting the car
#1
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Very long (5-10 second) cranks when starting the car
So I have a 05 530i and I am rolling right up on 148k miles. For the past year, when I come to start the car, it will randomly give me long cranks but it always ends up starting. These cranks can range from 5 seconds - 10 seconds and they happen in both winter and summer time as well as when starting it cold or starting it hot. These long cranks are seeming to happen much more frequently now. I took the car to the dealer last weekend to diagnosis the problem and they couldn't figure it out or replicate the problem. They did say though that I need a valve cover gasket and alternator belt which I plan on changing in the next couple of days. I changed the spark plugs last year hoping it would fix the problem but it didn't. So I am running out of options and have no idea what it could be. I did a lot of research on forums and found people saying its the fuel pump or the injectors but I couldn't find anyone who followed up with the issue and gave a definite answer. Also one of my mechanic friends said to change the crank sensor. So I am just lost as to what I should do. Any advice would be well appreciated and thanks in advanced!
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So I suppose you have an M54 engine and not an N52. On the N52 the symptom that you described could be caused by a failing eccentric shaft sensor which is part of the Valvetronic system, however the M54 engine does not have Valvetronic. Just want to make sure you do have M54 engine, otherwise you may want to check this part.
#5
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My Ride: E60 530i
Model Year: 2004
Engine: M54
I have similar startup issue too, very random and once a while. My car is M54 engine and battery was already replaced, still problem exists. No idea what is happening. Spark plugs were replaced too back in 60k miles. Car just turns to 100k.
#6
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My Ride: 530i
Model Year: 2004
Engine: M54
So I suppose you have an M54 engine and not an N52. On the N52 the symptom that you described could be caused by a failing eccentric shaft sensor which is part of the Valvetronic system, however the M54 engine does not have Valvetronic. Just want to make sure you do have M54 engine, otherwise you may want to check this part.
#9
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My Ride: E60 530i
Model Year: 2004
Engine: M54
#10
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My Ride: 2004 530i
I have the same issue on my 2004 530i. Every once and awhile it happens, once every 2 weeks or so. I had a new battery put in 6 months ago so I doubt its the battery.