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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 03-21-2012, 03:17 AM
Wildman536 Wildman536 is offline
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Bad gas? (not from tacos)

Sunday I was low on fuel and went to the station to fill up. While filling up I notice the truck that is filling up the gas station (do not know if this plays a role or not) I leave the gas station after filling and go straight home (5miles)

Monday am- drive to work (7-8 miles) while driving I am smiling literally because my car is riding the best it seemed to have ever ran since I purchased it! The ride home however is another story. Started up fine, while at stop signs/lights car starts to rough idle. Nothing crazy and it seems to work itself out a little as I go (or maybe it was in my head)

Tuesday am- start car, on the way to work I am stopped at a sign, VERY ROUGH idling! So I pull over to let it run at a standstill once again ROUGH idling- service engine soon light rears it's head, I am by a autozone so I pull it in the lot and call a friend to pick me up and drive me to work.

Tuesday pm- autozone pro (I say pro because this guy knows his stuff. Seriously) hooks up little diagnostics checker and gets a reading that says is consistent with Lean misfirings.

His conclusion- bad gas. Recommended lucas fuel cleaner add it to rest of tank, burn out the fuel, change fuel filter, clear codes- hope for best and if code comes up come back immediately for another readout.

So in all I kind of feel like this guy helped me out pretty well, (still have to runt the tank low though) already this am (wed) seems better. Please weigh in on this if you have any ideas.

Appreciate your time.

Last edited by Wildman536; 03-21-2012 at 03:20 AM.
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  #2  
Old 03-21-2012, 05:55 AM
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jonathan2263 jonathan2263 is offline
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What were the exact codes he got? Lean codes are usually caused by too much air (vacuum leak) not "bad gas". They try to push that fuel injection cleaner on everyone, I bet they're having some kind of sales contest. It can't hurt to run some injection cleaner occasionally, but I bet your rough idle comes back sooner rather than later.
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  #3  
Old 03-21-2012, 06:12 AM
drrpm drrpm is offline
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Sediment can be stirred up when a gas station is receiving a delivery but there are filters on the gas pump too so its not real likely to get into your gas tank. Every time I buy anything at an auto parts store they try to sell me a bottle of fuel injector cleaner. I always say no and haven't had any trouble with fuel injectors since the 1980's. Maybe the new fuel filter will help, but i wouldn't be surprised if the problem laid elsewhere.
Let us know how it works out.
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  #4  
Old 03-21-2012, 06:41 AM
Wildman536 Wildman536 is offline
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Its prolly in my head but the ride into work this am was actually kind of pleasant (could feel the vehicle wanting to rough idle but didn't)

Yeah I figured the injector cleaner stuff may be pushed heavily but at the time I was trying to do a pretty quick fix to get me going and do some massive research.

I will post the codes when I get them out of the car during a break.

Thanks!
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  #5  
Old 03-22-2012, 03:02 AM
Wildman536 Wildman536 is offline
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Alright so I was able to get around yesterday but still had the rough idling going on. Popped the hood and checked the air filter and looked at everything (visually) while listening to the car idle I noticed what sounded like a hissing (or an air leak sound) coming from the right side of the engine, (next to the little black box that sits between the air filter housing and the engine.) my dad was next to me and said it sounded like a vacuum leak of some sort. I left the car there and got a ride to the house. (as a result I left the stinking code readouts in it) going after work to hopefully diagnose, it runs great after started and put into gear)

Symptoms sound familiar???
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  #6  
Old 03-22-2012, 03:32 AM
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jonathan2263 jonathan2263 is offline
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Sounds like a torn intake boot, which would be right there next to the air box. The tear can be very small and hidden in the folds of the bellows, but again, check the codes.
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  #7  
Old 03-22-2012, 03:34 AM
Wildman536 Wildman536 is offline
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Ok, I'll get them on here when I get to the car. Thanks for the help!

(is replacement a pain on the intake boot?)
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  #8  
Old 03-22-2012, 02:10 PM
Wildman536 Wildman536 is offline
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Keep in mind All these codes are from autozones readout machine.

P0174- fuel trim bank two condition,

P0128- coolant temp is always low

P1083- fuel control mixture lean (bank 1 sensor 1)

P1085- fuel control mixture lean (bank 2 sensor 1)

P0171- fuel trim bank one condition

Please let me know if you need more info.

Thanks!!!
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  #9  
Old 03-22-2012, 03:27 PM
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Scottji Scottji is offline
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As jonathan said, lean codes usually indicate air getting in after the MAF (i.e., a torn intake boot). Spray some carb cleaner on the outside of the intake boot when the car is idling, and if the idle changes, then you've found your problem. Could also be a DISA valve or broken CCV hose, but the intake boots are easiest to check and cheap to replace.
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  #10  
Old 03-22-2012, 03:51 PM
Wildman536 Wildman536 is offline
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Thanks! I'll have to get some and spray away! I noticed a hose that had some rubber dry rotted on it and broken off, I put a new piece of rubber on it, didn't help
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  #11  
Old 03-24-2012, 06:11 PM
Wildman536 Wildman536 is offline
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Just changed the intake boot, still rough idling, spark plugs maybe?
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  #12  
Old 03-25-2012, 01:01 PM
Wildman536 Wildman536 is offline
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Update- changed out the intake boot, did spark plugs today, added coolant, started her up and now there's a clicking sound coming from the engine, and white smoke coming from the left side under the engine.

The smoke has been before but the clicking sound hasn't. Helllllppp!!!!!

Searched a little and found that I could have a bad vcg. Don't know how relevant the noise coming from the engine is if at all.

Thanks.
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  #13  
Old 03-26-2012, 05:08 AM
Wildman536 Wildman536 is offline
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So after all the work yesterday the car is still idling to cut off.

Took out the (disa) and looked at a couple of videos on YouTube about it, seems that if you crank the inner flap piece and put your finger over the hole it shouldn't move, mine moves after putting my finger over the hole to about the halfway mark, and it has a slight tick noise, (maybe similar to the one I hear after I start the engine inside the upper intake area.

Is it possible that I need to replace the disa? Would that contribute to the loud noise I hear in the engine after I turn the car on? And would it not let enough air get in and cause a stall??

Thanks again!
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  #14  
Old 03-26-2012, 05:35 AM
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jonathan2263 jonathan2263 is offline
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The noise and rough idle could easily be from the disa valve. They do rattle when they get worn out.
The P0128 code is a seperate issue from your lean condition. It means your thermostat isn't working properly. After fixing the rough idle, it's time to look at the cooling system.
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  #15  
Old 03-26-2012, 06:10 AM
Wildman536 Wildman536 is offline
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Thanks, the rattle sounds like there's something clanking inside the intake, took the disa out and checked its anatomy, looks intact (heard the pin could come out of the end and make noise inside), I'm just wondering I there's anything I can do to ensure its the disa before I lay down $200.

Took out icv sprayed it with carb cleaner and cleaned it out. Tht seemed to help a little (or it's in my head) but the little I drove it after doing the work (between the power outs) it drove like the first time!

The cooling system may be an issue, I was low on coolant and we filled it up, after starting the car the white smoke came up from under the engine, after the smoke stopped I backed the car up and saw a puddle on the ground under where the coolant was added (I have read that when you add coolant it can dump some out) but I'm wondering if I have a coolant leak inside or If during the addition some may have spilled) ---I was careful though on how I added the coolant---

I hope that I can get this thing goin soon, thanks again for the help!
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  #16  
Old 03-26-2012, 07:35 AM
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SJBimmer SJBimmer is offline
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Sounds like your thermostat is bad and not allowing the car to get up to proper temp. This can cause all sorts of running issues. Replace thermostat and go from there. Inspect all other cooling system components, or if your car has around 60-70-k just replace them all. The cooling system is a weak point on these cars, and if it fails you can cook the motor very easily. Don't wait on this as it can be very costly if you put it off.
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  #17  
Old 03-26-2012, 07:48 AM
Wildman536 Wildman536 is offline
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I'll look into the thermostat, would I notice it on the gauges inside the car? Nothing is changing there, just wants to cut off while idling.
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  #18  
Old 03-26-2012, 08:30 AM
Wildman536 Wildman536 is offline
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Dealer wants $293 for disa. Where do y'all recommend?
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  #19  
Old 03-27-2012, 06:13 PM
Wildman536 Wildman536 is offline
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Looking to change the CCV any good diys?
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  #20  
Old 03-28-2012, 09:03 AM
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Scottji Scottji is offline
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Quote:
Originally Posted by Wildman536 View Post
Looking to change the CCV any good diys?
Don't need to change the DISA unless its broken.

For CCV, they have this awesome website out now called "Google" You put words in and it finds things on the internet for you. Try typing in "e46 ccv diy" and see what happens.
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  #21  
Old 03-28-2012, 09:08 AM
Wildman536 Wildman536 is offline
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Did that on YouTube and got a bunch of different things. I'll google it today thanks.
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  #22  
Old 03-29-2012, 07:28 AM
forzam forzam is offline
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Quote:
Originally Posted by Scottji View Post
For CCV, they have this awesome website out now called "Google" You put words in and it finds things on the internet for you. Try typing in "e46 ccv diy" and see what happens.
Just curious, but why the need to be so condescending?
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  #23  
Old 03-29-2012, 08:57 AM
Wildman536 Wildman536 is offline
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Quote:
Originally Posted by forzam View Post
Just curious, but why the need to be so condescending?
I was thinking the same thing but didn't want to say anything to someone who is attempting to help. After seeing the post I posted at e46fanatics, and the climate seemed cooler for some reason.
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  #24  
Old 03-29-2012, 09:02 AM
forzam forzam is offline
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I can post some DIYs for the CCV later when I get to a different computer.

This video by Bavarian Autosport is supposed to be good.



You should probably have a smoke test done to rule out any vacuum leaks.
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  #25  
Old 03-29-2012, 09:12 AM
Wildman536 Wildman536 is offline
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Thanks for the video!

The how likely is it that the ccv could be the problem on this? The idle shuts it off shortly after start up. Did all this other stuff and am thinking if I change disa only and it's not the full problem I'll be disappointed
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