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Old 08-31-2011, 10:58 AM   #1
DukeofNuke
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Another Non-Starter

2002 E46 / 325i
It starts occasionally. I left it at my mechanics for three weeks, and he said it started every time. I brought it home, and it wouldn't start after two hours of driving. This has been going on all summer.
I replaced the battery,
I replaced the fuel pump.
Still, it sits there going dadadadadadada when I try to start it.
Sometimes I can put booster cables on it, and it will start after a couple of minutes, but this is with a new battery. Once it starts, it runs till you turn it off, then back to square one.
Error codes are:
P0171 System too Lean (Bank 1)
P0174 System too Lean (Bank 2)
My mechanic says that wouldn't keep it from starting.
I have considered the camshaft position sensor, but there is a OBD code for that, and I'm not getting it.

Any Ideas ?

Thanks.
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Old 08-31-2011, 11:43 AM   #2
Zchild
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If indeed your car started and you drove it for two hours and came home and it wouldn't start I would have to say your alternator for some reason isn't charging your battery. It could be as simple as a bad ground either in the trunk or under the hood. Have your alternator checked at your nearest Checker Auto or AutoZone. Just my two and a half cents worth...
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Old 08-31-2011, 11:48 AM   #3
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since your car isn't giving you the cam position sensor code, i don't recommend wasting your money on that. I have the same problem, something is draining my battery and it was on and off. So my mechanic came to my house and we got a cam position sensor code, so he called another friend to see if that could be it, apparently it's called a pulse generator in the realoem catalog and it somehow interacts with the spark plug and that could maybe me the problem...well i bought it, we changed it, and my car still dies on occasion, now i'm getting a MAF code....
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Old 08-31-2011, 12:00 PM   #4
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+1 on having the battery/charging system checked at autozone. mine was doing similar things, replaced the battery and it seemed to be starting slow. Turns out the starter was bad. If you can eliminate the Alternator being the issue my guess is starter. Good luck cause the Starter is expensive and a PITA if you do it yourself!
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Old 08-31-2011, 12:08 PM   #5
DukeofNuke
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If indeed your car started and you drove it for two hours and came home and it wouldn't start I would have to say your alternator for some reason isn't charging your battery. It could be as simple as a bad ground either in the trunk or under the hood. Have your alternator checked at your nearest Checker Auto or AutoZone. Just my two and a half cents worth...
I did that, and they said the starter and alternator checked out OK.
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Old 08-31-2011, 02:43 PM   #6
MF325XI
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Not sure how they can really test the starter without pulling it out of the car.... My bet is still Starter. what kind of voltage do you get at the battery while the car is running (should be around 14.5 volts) ? HOw many amps is the alternator pushing?

Did you replace the fuel filter as well? That is cheap and easy to do and probably needs to be done anyway, it has the fuel pressure regulator built into it so that could be a cause.

Has this car overheated recently or any mods done prior to this issue? You should have a compression check done to make sure it isn't something in the engine (pretty unlikely since the car does run). Also, check all wiring to make sure it's tight and now corrosion.
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Old 08-31-2011, 02:58 PM   #7
dirsh
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is it cranking and not turning over?
sorry don't know what dadadadada means
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Old 08-31-2011, 04:08 PM   #8
DukeofNuke
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is it cranking and not turning over?
sorry don't know what dadadadada means
Yes, it cranks but does not start.
Sorry, dadadada is my best written impersonation of the sound.
It does not "click, click, click", as a dead battery. The starter runs, but it does not "catch".

Quote:
Originally Posted by MF325XI
Did you replace the fuel filter as well? That is cheap and easy to do and probably needs to be done anyway, it has the fuel pressure regulator built into it so that could be a cause.
I did not know that. Hmmmm.
It sure acts like it's not getting fuel, but I can screw-up changing the oil in a lawn mower, so what do I know ?
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Old 08-31-2011, 05:00 PM   #9
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Use advanced/title search.

There are other little things...sap failure might do this when engine is cold. Try another key...but search 'no start' threads...you'll have a long list of possibles.

Work simple and easy to check ones first. It does sound like battery, though, even though it's new. Did you have it checked at the place you bought it from? If so, maybe they just say this hoping you go away for a while and maybe get a new alternator...not to accuse them of faulty diagnosis or anything!

Get multimeter or do cluster test.
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Old 08-31-2011, 08:34 PM   #10
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do you hear the fuel pump priming? If not, it could be the fuel pump relay. Swap it with the horn relay to test. easy and free test

when my fuel pump relay was going out, I would have to turn the key on and off (not cranking) several times before the fuel pump would kick on.
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Old 09-01-2011, 08:25 AM   #11
DukeofNuke
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do you hear the fuel pump priming? If not, it could be the fuel pump relay. Swap it with the horn relay to test. easy and free test

when my fuel pump relay was going out, I would have to turn the key on and off (not cranking) several times before the fuel pump would kick on.
I'll give this a try

Unfortunately, the car is at my sons house, 2 hours away (that's where I was when it quit). I'm hoping to get it to start like it sometimes does to get it home.
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