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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Are long cranks always the fuel pump?



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      03-02-2009, 11:28 AM   #1
freshwhite335
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Are long cranks always the fuel pump?

or is there something else that can cause them?
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      03-02-2009, 11:50 AM   #2
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Weak battery.
Aged electrical / plug wires.
Bad angle sensor messing up your timing.
Dying ignition modules.
Poor (read : ghetto 3rd world blend) fuel / significantly old fuel.
Water in your fuel.
Someone managed to pour more than a dash of diesel before catching their mistake (and filling up with petrol the rest of the way), and you're just hard-to-ignite-cold.
Weak/failing primer pump.
Unusually cold weather.
Engine sludge/gunk (i.e. car has sat a few months not used)
Any number of issues related to aspiration ('funky' throttle valve response, or failing choke)
Chunks of banana in your exhaust pipe...
Gremlins...
(Really I could go on)

Get your codes checked ?

-scheherazade
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      03-02-2009, 12:13 PM   #3
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Take it to your local dealer so you'll know exactly whats going on.


goodluck!
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      03-02-2009, 01:20 PM   #4
freshwhite335
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i ask because i took the car in for long cranks and assumed it was just another bad HPFP. i ended up having my DME replaced. the old DME had no fault codes and the new one didnt have any either. i had been long cranking for a while on the old DME so i assumed some codes would have been thrown. but does the car have an error code or long cranks? or just when the pump fails ?
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      03-02-2009, 01:29 PM   #5
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I've been having the same problem long cranks. I talked to my SA and he said if there is no code there's nothing I can do. The car is progressivley getting worse but I ffeel like I shouldn't have to drive my car to shit before I can get the stealership to warranty it or even look at the fuel pump.
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      03-02-2009, 01:47 PM   #6
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Quote:
Originally Posted by Hallandale E92 View Post
I've been having the same problem long cranks. I talked to my SA and he said if there is no code there's nothing I can do. The car is progressivley getting worse but I ffeel like I shouldn't have to drive my car to shit before I can get the stealership to warranty it or even look at the fuel pump.
exactly. my $50k car should be long cranking. it has a warranty, its a very well known issue, fix what the culprit usually is and let me get on my way
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      03-02-2009, 08:25 PM   #7
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i had long crank 1 time when i had jb3 in my car but it was a very cold night and car was outside for a long time but i tried again n everything is working perfectly still have jb3 in the car haha never brought into dealer or anything.
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      03-02-2009, 10:05 PM   #8
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it could be anything from fuel quality, to a fuel pump, to a dme software issue..
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      03-02-2009, 10:30 PM   #9
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theres really no fix, you just get another shitty pump and wait til that one dies

its just like a timed game... i'm on my fourth fuel pump (I dont just take it when it cranks long, it limps repeatedly and shows numerous fuel pressure codes)
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      03-02-2009, 11:06 PM   #10
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Quote:
Originally Posted by sd390r View Post
theres really no fix, you just get another shitty pump and wait til that one dies

its just like a timed game... i'm on my fourth fuel pump (I dont just take it when it cranks long, it limps repeatedly and shows numerous fuel pressure codes)
That's crazy. Could you get a lemon b/c of that? I know i would be annoyed I just had mine replaced last 10 days ago at 21K miles There were long cranking, and once it felt as if it was going to stall while driving it.
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      03-02-2009, 11:10 PM   #11
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took the car in tonight and im sure ill get a call tomorrow around lunch time with whats gonna happen. decided to get it aligned while it was there, that way even if they do nothing i dont feel like it was a total waste of my time bringing it out there
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      03-02-2009, 11:43 PM   #12
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hmm.. dont know the rules of lemon laws... i drive so much though, I took delivery on july 8th 2008 and as of feb 28 2009 i have 24k miles
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      03-03-2009, 12:14 AM   #13
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Quote:
Originally Posted by Hallandale E92 View Post
I've been having the same problem long cranks. I talked to my SA and he said if there is no code there's nothing I can do. The car is progressivley getting worse but I ffeel like I shouldn't have to drive my car to shit before I can get the stealership to warranty it or even look at the fuel pump.
I took mine in 2 weeks ago, long cranks. foul smelling exhaust.

no visible codes, no limp modes.

dealer found the engine had the "long crank" code so replaced my pump. no questions asked. so take it to the dealer and check.
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      03-03-2009, 12:26 AM   #14
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Quote:
Originally Posted by sd390r View Post
hmm.. dont know the rules of lemon laws... i drive so much though, I took delivery on july 8th 2008 and as of feb 28 2009 i have 24k miles
about 3k a month. im doing about 1600 during the school year. im sure ill be close to 3k once during the summer
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      03-03-2009, 10:16 AM   #15
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Quote:
Originally Posted by scheherazade View Post
Weak battery.
Aged electrical / plug wires.
Bad angle sensor messing up your timing.
Dying ignition modules.
Poor (read : ghetto 3rd world blend) fuel / significantly old fuel.
Water in your fuel.
Someone managed to pour more than a dash of diesel before catching their mistake (and filling up with petrol the rest of the way), and you're just hard-to-ignite-cold.
Weak/failing primer pump.
Unusually cold weather.
Engine sludge/gunk (i.e. car has sat a few months not used)
Any number of issues related to aspiration ('funky' throttle valve response, or failing choke)
Chunks of banana in your exhaust pipe...
Gremlins...
(Really I could go on)

Get your codes checked ?

-scheherazade
I agree with everything excpet the weak battery.
If you had a weak battery then there would be a slow crank.
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