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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 04-04-2013, 04:42 PM
Stephanie1988 Stephanie1988 is offline
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Location: Utah
 
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Mein Auto: 2004- 325i
2004 325i BMW idling weird and check engine light on

So I was just on my way home from work when i notice that my check engine light came on. When I came to a stop at a light, it was almost like my car was going to shut itself off...almost like it wasnt getting any gas and then all the sudden it would come back to normal...then back to almost shutting the engine off again. any ideas?
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  #2  
Old 04-04-2013, 05:24 PM
flannfan325Ci flannfan325Ci is offline
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Mein Auto: '04 325Ci
Go to autozone and get a diagnostic check, for free. Then run the code(s) online.
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  #3  
Old 04-04-2013, 07:13 PM
Stephanie1988 Stephanie1988 is offline
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i plan on doing that tomorrow after work, but don't know if im going to be able to make it to work without breaking down....
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  #4  
Old 04-04-2013, 09:49 PM
heztheone heztheone is offline
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Mein Auto: 330i ZHP M/T
could be a failing fuel pump, i wouldn't take it anywhere unless u'r looking to get stranded.
get this, it's a great little thingy to keep it with u at all times.
report back with the error codes.
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  #5  
Old 04-05-2013, 08:45 AM
Stephanie1988 Stephanie1988 is offline
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Great. Now I am all freaked out of getting stranded and I took my car to work today :/ It seemed to do just fine on my way to work, but check engine light is still on. It only seems to act up when its at a complete stop... so lets hope I don't hit any lights on the way home today! I'm purchasing that diagnostic tool, since this isn't the first check engine light that has came on in this car and it only has 95,000 miles! Ugh.
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  #6  
Old 04-05-2013, 09:46 AM
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ahull ahull is offline
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Mein Auto: ist schnell! (03 330i SC)
You may just have a torn rubber intake hose letting in too much air. Car will run fidgety but if you drive a little on the easy side you'll be fine for the short term. Could be fuel pump as mentioned which can strand you, but hard to say with no real info to go on.

Usually these cars need quite a bit of refreshment parts at 80-100k. Read up on the e46 wiki link on this page about maintenance, etc if you haven't already. Your cooling system definitely needs a refresh by now if you haven't. That would be priority after the check engine issues.
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DIY MODS: AA Stage I supercharger, Meyle HD FCAs w Powerflex CABs, Bilstein shocks, Meyle HD Rtabs, Angel Eyes, Clear Corners/Markers w/ LEDs, LED tails, ZHP rims, Akebono pads, AUX input
DIY E46 Merit Badges: Sunroof resurrection, CCV, OFHG, VCG w/ VANOS seals, DISA, Cooling Refresh I, steering giubo, window regs, Magnetic Infandibulator (see wiki)
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Last edited by ahull; 04-05-2013 at 10:02 AM.
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  #7  
Old 04-05-2013, 01:59 PM
Stephanie1988 Stephanie1988 is offline
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Location: Utah
 
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Mein Auto: 2004- 325i
Thanks! I have replaced the coolant system -that was the first thing to go out. The second thing that was replaced was the mass air flow sensor boots. This will be the 3rd major thing. I mean...i've replaced all my window regulators, but I wouldn't consider that anything major.
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  #8  
Old 04-05-2013, 02:49 PM
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SJBimmer SJBimmer is offline
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Quote:
Originally Posted by Stephanie1988 View Post
Great. Now I am all freaked out of getting stranded and I took my car to work today :/ It seemed to do just fine on my way to work, but check engine light is still on. It only seems to act up when its at a complete stop... so lets hope I don't hit any lights on the way home today! I'm purchasing that diagnostic tool, since this isn't the first check engine light that has came on in this car and it only has 95,000 miles! Ugh.
I have the same scanner for quick checks. It's well made for what it costs, and worth the $20.11.
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  #9  
Old 04-05-2013, 05:20 PM
Stephanie1988 Stephanie1988 is offline
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Location: Utah
 
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So I took it into AutoZone. When they typed in the code it came up under a "Volkswagen"? anyways....he said its the crankshaft position sensor....?? and someone else told me this is super difficult to get to. the part is 90 bucks, but labor will kill me. Is this true?
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  #10  
Old 04-05-2013, 06:02 PM
boltaction boltaction is offline
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Mein Auto: 2002 325i
It is by no means super difficult, more like a pain in the ass, any local shop should be able to sort it quite quickly, and definitely get it done sooner than later.. In the grand scheme of **** it coulda been, not too bad.
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  #11  
Old 04-05-2013, 06:59 PM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
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Mein Auto: 02 BMW 525i M54 automatic
If you own a bimmer, you must spend the $25 to have one of these (especially if you're in California or Hawaii - but luckily the OP isn't):
- Cheapest CAN OBDII scanner on the net that reads DTCs, pending codes, & clears codes

As for the CKP, these, in the E39 side of the house, may help (since we share engines):
- How to locate, access, and replace the CKP crank position sensor in the I6 (1)
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Note: Your mission, should you decide to accept it, is to add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need, in seconds!
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  #12  
Old 04-06-2013, 11:49 AM
Stephanie1988 Stephanie1988 is offline
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Location: Utah
 
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Mein Auto: 2004- 325i
any ideas on how many hrs it will take a shop?
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