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Old 01-07-2014, 03:03 PM   #1
arek
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2005 BMW 325I wont start..wtf

My mothers 2005 bmw sedan 325 won't start...

Fuel pump has been replaced, fuel relay fuse, sparkplugs, checked the coils and they are working...

Car cranks but won't turn over...

any ideas?
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Old 01-07-2014, 05:10 PM   #2
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Any error lights showing?
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Old 01-07-2014, 05:38 PM   #3
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Holy smokes - that's the 3rd no start post of the 4 most recent posts...

My standard answer now... any gas in it? Could it be frozen... read the other two posts....
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Old 01-07-2014, 05:55 PM   #4
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Old 01-07-2014, 09:55 PM   #5
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Cars been sitting in the garage for a month now, so its not this current shitty weather unfortunately.. it was doing this before, and we switched out the fuel pump and it was running fine, and now again... This type we know it cant be the fuel pump because we hear it priming.


Does have a light on, 02 sensor.. but that's been there for 3 years now.. lol
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Old 01-07-2014, 10:12 PM   #6
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Even though you hear the pump priming you should check to see what the fuel pressure is. Wouldn't be the first faulty new part I have seen
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Old 01-08-2014, 01:30 AM   #7
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Did you replace the fuel filter when you did the fuel pump?
How warm is the garage? Most garages are close to outside temps, so don't rule out frozen fuel, especially if she doesn't drive a lot. It may still have summer fuel in it.
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Old 01-08-2014, 01:00 PM   #8
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Battery?
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Old 01-08-2014, 03:02 PM   #9
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So if the car cranks but doesnt start up it really shouldnt be that battery.
You have to isolate wether you have lost fuel or spark. (or possible an electrical issue).

Also might be easier to isolate if you have an codes, does your electrical light come up (EML? i think)? Do you have a OBD2 scanner?

1) Open up your gas tank and have a buddy turn the car on, do you hear the Fuel Pump prime (4 second hiss). If not then thats your issue.

2) Unplug your MAF sensor and try start it, failed MAF's have stopped E46s from starting before.

3) How much gas does your tank have? If low, dump a bottle of gas antifreeze and a small jerry of gas and she if it starts.

Another idea would be is to get some car starter spray, or carb cleaner, and spray some into the intake while someone tries to start it. If it revs up some then you know your issue is somewhere in your fuel delivery.
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Old 01-08-2014, 09:47 PM   #10
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thanks guys

g12, thanks for the writeup bro.

I'm gonna try the MAF thing tomorrow..

We definetly have gas, and its not frozen either since that cars been sitting for a good month now and my mom drives a different car since.

fuel pump is priming, and no electrical lights other then an 02 sensor (CEL).

Might try and replace the fuel pump again if the MAF thing doesn't work.. hope its something as small as that!
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Old 01-08-2014, 11:16 PM   #11
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If you can hear the Fuel Pump prime I really dont think that would be it.
Find a fuel line in your engine bay and pinch it while some one turns the key to prime the Fuel Pump, if the line gets hard you have pressure.

I think the easiest thing to try is using the car starter/carb cleaner thing.
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Old 01-08-2014, 11:38 PM   #12
Blackedout95
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Funny I was always taught fuel wont freeze, just become more jelly like.

At any rate good advice in the thread so far, fuel, spark, gas, filter, pump, battery, ground etc all places to start.

And yes even brand new bmw supplied parts fail quickly or are faulty right out of the box, it can happen.
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Old 01-09-2014, 07:38 AM   #13
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Do these things have Schrader Valves (tire valves) on the fuel rail? That's any easy check...press it when it's pressurized see what comes out - watch your eyes!
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Old 01-09-2014, 09:33 AM   #14
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water in the gas? does she drive it till its empty or when its kinda half empty and then fill it up again. When was the last oil change?
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Old 01-09-2014, 10:41 AM   #15
Blackedout95
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Unless you are familiar with how much pressure to look for by eye (which I doubt) we use a pressure gauge. You shoul dsee roughly 50 if pressurized properly because even at 20 say youll still see fuel come out but it may still have an issue. Best to get it checked properly.
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