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Old 10-05-2012, 10:56 PM   #1
threetwentyfizzle
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So my car is stalling out tonight... BAD

So tonight my car has been on the fritz pretty bad. Just out of nowhere my car started to and has continued to stall out pretty badly on my way home. Any load on my motor from putting my car into gear (mt) results in my car bogging down and stalling. Had to literally burn my clutch any time I want to start from a dead stop and had to downshift like crazy when slowing down to avoid killing the motor. Of course, it usually did stall once rpms fell to 500.

So you guys know, I have swapped a rebuilt motor in my car over the summer, and since the swap, have been trying to fix a bouncing idle so thus replaced/cleaned all the usual culprits i.e. vacuum lines, icv, tb, cleaned my maf, replaced my DISA O ring, lower/upper intake boots, entire ccv system... You name it. Vanos seals are on my to do list as my car has been lacking low end power since the motor swap.

I am running a CAI and headers and already have a SES light on from not wiring my O2 sim in yet so I'm sure whatever issues I have now are throwing codes I just haven't had the opportunity to pull codes tonight.

I have a strong feeling the bouncing idle is developing into this stalling issue and was wondering if there's something I may have overlooked when replacing all these items? Anyone else experience similar problems? I made a quick video ill try to upload or post a link here shortly. Thx for the input everyone

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Old 10-05-2012, 11:14 PM   #2
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Was there a fuel filter and fuel pump on that list? Because that is what it sounds like.....
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Old 10-06-2012, 05:09 AM   #3
threetwentyfizzle
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Fuel pump, sending unit, and fuel filter have all been replaced last year. Not sure if it's fuel delivery cuz it's not missing once I'm in gear and going it just sucks I can't let the rpms fall past a grand without it stalling

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Old 10-06-2012, 05:13 AM   #4
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Suggest you get the codes read and read the first link below in my signature.
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Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

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Old 10-07-2012, 12:43 AM   #5
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Originally Posted by threetwentyfizzle View Post
Fuel pump, sending unit, and fuel filter have all been replaced last year. Not sure if it's fuel delivery cuz it's not missing once I'm in gear and going it just sucks I can't let the rpms fall past a grand without it stalling

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Sorry to hear that, because that leaves about 300 other possibilities, and anything else anyone writes is just going to be guessing, without more info. I only mentioned those because you did not list them. Good luck with it though. Maybe more specifics will narrow it down.

Edit: Well, I missed this before I posted, so that sounds like a valid issue.
Quote:
Originally Posted by threetwentyfizzle View Post
Another update,
Ran faults and looks like there is a fault for the exhaust cam position sensor. Will see if replacing the sensor will yield some positive results. I will update Monday. Thanks to all who shared and contributed to this thread.

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Last edited by MJLavelle; 10-07-2012 at 12:46 AM.
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Old 10-06-2012, 05:27 AM   #6
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jfoj, you're on duty early this morning!

OP, the bouncing idle you had been having sounds like it could be icv, of course, and that would cause your stalling. Did cleaning the icv have any effect?

Have you checked the vac lines behind the intake manifold? I know you said you replaced all hoses, but wonder about those?

Anyway, I really do think you need to get codes read. If it's none of the usual suspects, then I'd think codes might point to some sensor or the like.

Have you done any 'non-stock' things to your car you didn't mention? After your engine swap, was your car running good, or did the bouncing idle happen right away?
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Old 10-06-2012, 05:32 AM   #7
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i would unplug your maf to see if that helps. also, even if you recently changed your plugs, I can't stress enough to check them again. and check more than one. my plugs although I checked them while doing valve cover gasket were covered in oil, or at least 1-2 or them. when I "checked" them, I only checked on and it looked good, so I assumed they were all good.
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Old 10-06-2012, 06:27 AM   #8
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Still a newbie to Beemer world, but I had this problem replaces my intake and exhaust cam angle sensors. Then the solenoid and it's been fine every since. Just my .02
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Old 10-06-2012, 06:28 AM   #9
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But I was told they r just magnets, and when I replaces it at first it was a bad sensor appetenly a common problem? So maybe u got a bad one if u already replaced them?
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Old 10-06-2012, 06:39 AM   #10
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Last night I did my valve cover gasket and cleaned both solenoids and the valves inside them for the vanos. Idles like a dream now and has TONS more power. Also earlier this week I replaced intake side cam sensor. Probably need to do the exhaust side. But my car wouldn't run unless the MAF was unplugged. So cleaning the vanos solenoids has made a dramatic difference!

PS get a shower valve socket set for that bottom solenoid.
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Old 10-06-2012, 08:22 AM   #11
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Quote:
Originally Posted by dmax View Post
jfoj, you're on duty early this morning!

OP, the bouncing idle you had been having sounds like it could be icv, of course, and that would cause your stalling. Did cleaning the icv have any effect?

Have you checked the vac lines behind the intake manifold? I know you said you replaced all hoses, but wonder about those?

Anyway, I really do think you need to get codes read. If it's none of the usual suspects, then I'd think codes might point to some sensor or the like.

Have you done any 'non-stock' things to your car you didn't mention? After your engine swap, was your car running good, or did the bouncing idle happen right away?
Jfoj,
Have read thru your Sig religiously, it is my bible lol. I have done just about everything mentioned except cam position sensors knock sensors and all that.
I really do need to pull codes I am going to do that today at work hopefully.

Dmax,
Yup, I have replaced every vacuum hose at the time of the swap. The "f" connector on the intake boot that runs to the fuel filter and ccv I believe, and other various vacuum hoses I think there were about 7 or so I replaced. And I cleaned my icv about 2 months ago in hopes to fix that bouncing idle which was prevalent from the moment I swapped the rebuilt motor.

The bouncing idle has improved in the last month or so but my thought is because the weather is getting cooler. My vanos has been a main concern for me this whole time as well so I'm wondering if that could be part of the cause. I tried unplugging the maf last night and there was no difference it was stalling after I did that too whenever I gave it gas.

Oh, and non-stock mods, just the intake and headers and I'm sure the intake could be causing part of the problem.


Will try to upload a video so you guys can see what's going on. Thanks for the replys guys I appreciate the help!

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Old 10-06-2012, 08:25 AM   #12
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Quote:
Originally Posted by xfixkaos View Post
Still a newbie to Beemer world, but I had this problem replaces my intake and exhaust cam angle sensors. Then the solenoid and it's been fine every since. Just my .02






Quote:
Originally Posted by twistatech View Post
Last night I did my valve cover gasket and cleaned both solenoids and the valves inside them for the vanos. Idles like a dream now and has TONS more power. Also earlier this week I replaced intake side cam sensor. Probably need to do the exhaust side. But my car wouldn't run unless the MAF was unplugged. So cleaning the vanos solenoids has made a dramatic difference!

PS get a shower valve socket set for that bottom solenoid.
Interesting, I'm going to look into this, possible culprit right here.


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Old 10-06-2012, 08:34 AM   #13
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Here's a link to the YouTube video I uploaded just now



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Old 10-06-2012, 08:36 AM   #14
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Last edited by threetwentyfizzle; 10-06-2012 at 08:37 AM.
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Old 10-06-2012, 10:42 AM   #15
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I have a cold air intake on mine. The filter sits right by the left fog light on my m3 front bumper. At first I thought my CEL was caused by it too. After fixing some minor issues, the light has been off for a while.
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Old 10-06-2012, 12:12 PM   #16
threetwentyfizzle
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So drove my car to work this morning, no idle hunt or stalling.. temperature this morning was colder (55F) as compared to last nights temperature (70F).

I really wonder what's going on, to cause these intermittent issues

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Old 10-06-2012, 06:19 PM   #17
threetwentyfizzle
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Another update,
Ran faults and looks like there is a fault for the exhaust cam position sensor. Will see if replacing the sensor will yield some positive results. I will update Monday. Thanks to all who shared and contributed to this thread.

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Old 10-06-2012, 06:51 PM   #18
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Unclear if all of those codes are current on your car??

Suggest you log date, mileage and codes, clear then see what comes back.

Exhaust CPS has less impact on performance that intake as far as misfires & stalling.

CPS are problems, but you have a lot of codes and I would bet the lean codes are more of problem.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

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Old 10-06-2012, 10:21 PM   #19
threetwentyfizzle
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Quote:
Originally Posted by jfoj View Post
Unclear if all of those codes are current on your car??

Suggest you log date, mileage and codes, clear then see what comes back.

Exhaust CPS has less impact on performance that intake as far as misfires & stalling.

CPS are problems, but you have a lot of codes and I would bet the lean codes are more of problem.
Lol yea unfortunately all those codes were from my car. However... I know why most of the other codes are being thrown. Maf code because I unplugged the maf last night trying to diagnose, catalytic defficiency codes from the headers (no O2 sim yet) and oil level sensor is bad so codes for that.

Anyway, I did reset adaptations and drove for a bit and checked faults again and the cam position sensor was thrown again.

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Old 10-07-2012, 10:32 PM   #20
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I dont think you get a cel for thermal oil sensor being bad. At least my car didn't and i know it's bad. Pa soft did indicate it.
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