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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 08-08-2014, 07:50 AM   #1
Dr.frankinstein
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Join Date: Feb 2013
Location: elkhorn
Posts: 81
My Ride: 01 330xi and more
Running problems help please!

So I'm loosing the battle with my 2001 330xi has 155xx miles.

The car runs rough at idle not to bad with throttle open at full throttle it Boggs down.

With the maf disconnected it runs better until the car warms up the starts running rough again. It will start missing while crushing and shifts hard assuming from the maf being disconnected.
It had 1 code for the maf ( I disconnected it)
And 1 code that was iacv stuck shut

I have tried:

Smoke test for vacuum leaks
Cleaning the maf
Changing coils around
Spark plugs
New intake boot
Intake gaskets
Disa valve


I'm lost the car does not want to cooperate for me.i need help solving this ASAP kinda need the car. What am I missing here?

Here are the recent codes that came up

p1085 p1345 p1343

Clogged fuel filter? With the maf plugged in it will idle until it dies

I can hold it at wot and get 4500rpm and that's it

Maf unplugged it revs fine but starts to miss at idle and while driving sometimes?
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Old 08-08-2014, 07:59 AM   #2
io14
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Join Date: Nov 2012
Location: Massachusetts
Posts: 50
My Ride: 05 325XI
did you clean your idle control valve ? when was the last time the fuel filter was changed ?? this could be a good starting point !
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Old 08-08-2014, 08:57 AM   #3
Dr.frankinstein
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Location: elkhorn
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I have cleaned the iacv fuel filter no I have not. I have one on its way should get it next Wednesday.


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Old 08-08-2014, 02:09 PM   #4
fn42
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My Ride: 2001 330 xi
I had similar symptoms when my fuel pump was going. It died slowly over a week, idled super weird for a few days then stopped revving past 3k
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2001 330xi 5mt, 177k
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Old 08-08-2014, 03:40 PM   #5
Dr.frankinstein
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So when I unplug the maf it revs all the way but starts missing when it warms up


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Old 08-09-2014, 12:43 PM   #6
io14
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you have replaced all of the electrical components so my gut feeling it is either spark or fuel so replace the fuel filter as well as the fuel pump.
Try the fuel filter 1st, I have seen cars that literally stop in their tracks because of a clogged / dirty fuel filter.
" Let us know "
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Old 08-09-2014, 10:21 PM   #7
Dr.frankinstein
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Just took a fuel pressure reading and it is 50psi shut off and it stays at 45psi.

The gas is yellow looking also? Bad gas?


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Old 08-09-2014, 11:09 PM   #8
can0n4
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My Ride: '04 330xi, '04 X3
Gas near me is yellow like I drank enough water for the day and took a leak yellow.

Old gas is usually dark yellow, like when you take a piss and you're wondering if your kidney's still work.

Wouldn't hurt to switch stations and put in fresh gas.

How long did it hold 45psi?
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Old 08-10-2014, 12:21 AM   #9
Dr.frankinstein
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I left it there for about 5 mins

I'm not sure if the fuel filter has ever been replaced in this car so maybe the old filter is making the gas nasty? It is not ver cold to the touch


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Old 08-10-2014, 12:41 AM   #10
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Click image for larger version

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Sample of gas from fuel rail on right gas from a gas can in the garage left


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Old 08-10-2014, 05:02 AM   #11
jfoj
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Could be a questionable load of fuel, but this would be easily sorted when the fuel is used up, dilute it out with new fuel.

Suggest you read the first 2 links below in my signature.

Sounds like you may have a Leaning condition??

Fuel Trim info both as warm idle and steady highway cruise along with Freeze Frame data would be useful.
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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

Lower hose fan switch O-ring - BMW #13621743299

Last edited by jfoj; 08-13-2014 at 03:44 AM.
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Old 08-10-2014, 08:40 AM   #12
BavarianBeast
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didnt read this in your post BUT the lil vac. line that leads to the fuel filter is suspect for cracks & tearing also??? might be worth checking/replacing... also try idling the car & spraying carb/brake clean around all the intake components (intake boot"S" -- DISA -- IAC -- intake gaskets area...) i had a customers car with similar cond. turned out DISA was leaking at its seam, also broke vac. line at the fuel filter. ran good at part throttle cruise but idle was crap, & rough up top.
GOOD LUCK


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Old 08-10-2014, 12:01 PM   #13
Dr.frankinstein
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Smoke tested again and used carb cleaner no leaks I can find. Vacuum line on fpr is silicone now problem persists


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Old 08-10-2014, 07:02 PM   #14
jfoj
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Quote:
Originally Posted by Dr.frankinstein View Post
Smoke tested again and used carb cleaner no leaks I can find. Vacuum line on fpr is silicone now problem persists
Problem is smoke test will not test/confirm a vacuum brake booster issue due the check valve on the booster.

Your car is an '01, I am starting to see brake boosters fail at year 11 and later fairly often now.

Need to see OBDII Freeze Frame and warm idle Fuel Trim data.
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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

Lower hose fan switch O-ring - BMW #13621743299
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Old 08-10-2014, 07:34 PM   #15
Dr.frankinstein
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We'll I can confirm that the booster holds vacuum in it

I will get fuel trim reading wednsday or Thursday when I get some more time


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Old 08-11-2014, 05:49 PM   #16
Dr.frankinstein
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Old 08-11-2014, 05:51 PM   #17
Dr.frankinstein
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That is at idle the fuel filter allowed it to idle some still dies out though


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Old 08-11-2014, 07:05 PM   #18
jfoj
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What is the history of the current tank of fuel?

Has the problem gone beyond a single tank of fuel.

STFT of 27% means there is a clear problem that should not be too hard to find.

What is the history on the O2 sensors being disconnected?
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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

Lower hose fan switch O-ring - BMW #13621743299
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Old 08-11-2014, 07:09 PM   #19
Dr.frankinstein
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The problem has been beyond a couple fills

I have disconnected them 1 time 1 year ago

I'm just so lost as to where to look at this point it should be obvious and big but can't seem to find it.


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Old 08-12-2014, 10:16 PM   #20
Dr.frankinstein
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Ok I emptied the cars gas we'll till it wouldn't run any more.

Removed intake

Made sure there was no cracks, hoses, or anything out of the ordinary I could have missed.

Made sure injectors where not leaking, dripping dirty or looking at me funny

Cleaned iacv again
Cleaned throttle body again
Put a different disa valve on just incase
Double checked everything

Fresh gas
Fresh filter
More frustration
And no changes

No codes or anything now wtf!



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