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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 11-10-2012, 10:34 AM   #401
NC330ci
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Had my CCV / lower intake boot replaced, ICV and throttle body cleaned by dealer in VA beach yesterday. Idling, the car is silent, acceleration seems much smoother.

Had replaced upper boot and disa oring about a month ago.


thanks to the OP for the info

Last edited by NC330ci; 11-10-2012 at 10:37 AM.
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Old 11-13-2012, 07:48 AM   #402
oneunder
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It got cold in MN today. Cars idle was rough, and seemed like it was misfiring or not timed correctly.

Found this page, and started ordering some of the seals and o-rings. Thanks for the info!!!
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Old 11-27-2012, 08:10 AM   #403
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Replaced the CCV hose, intake air temp o-ring, and the lower intake boot. Today was the first day it was cold enough to where it should have had issues. Started, idled, and ran fine all the way into work.
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Old 11-27-2012, 01:08 PM   #404
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DISA or DISA O-ring may be next to check.
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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 11-27-2012, 01:09 PM   #405
oneunder
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I already have the DISA o-ring, just not installed yet.
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Old 11-27-2012, 06:58 PM   #406
jfoj
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Also check the SAP control valve vacuum line, this is a VERY common problem that only impacts things for the first few minutes of start up.
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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 11-27-2012, 08:19 PM   #407
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It ran fine all day. I think I am good to go.
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Old 11-30-2012, 07:02 AM   #408
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nice
thanks for the info
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Old 11-30-2012, 09:38 AM   #409
love2drive330CI
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Quote:
Originally Posted by jfoj View Post
......With the kind of mileage you have, I would expect possibly a lot of carbon build up on the back of the intake valves. Dry carbon on the back if the intake valves and in the intake path acts as a sponge to lean out the initial cold start fuel mixture until the carbon is fuel saturated again, then on immediate restart the problem will not usually be there. I used to see this back in the late 80's where some of the GM V6 would start and stall on once, then upon restart, they were fine. We used to trick the coolant sensor to enrichen the mixture for start up and the stalling would not happen. Walnut shell blasting the intake valves with the head still on was one solution along with different fuel additives.

The problem with higher mileage engines is the valve seals start to leak oil down the valve stems, then the carbon is hard to combat.
JFOJ, I am considering pulling off manifold(from my saga thread) to clean out the dry carbon. Any other alternate methods you(anyone else) can think of that I can use to clean off the carbon with manifold removed as I don't have the tools for the walnut shell blasting?
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Old 11-30-2012, 10:36 AM   #410
jfoj
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Walnut blasting supplies -

http://www.harborfreight.com/25-lbs-...dia-92155.html

http://www.harborfreight.com/portabl...kit-37025.html

Now what you need to know is you need a decent air compressor, a smaller one may work, but it will take you a long time.

Also you will need googles, a dust mask and something to keep the walnut shells from ending up in other cylinders and places you do not want the material.

There are other more specific and costly options, but you may not even need this??

If you want to pull your intake, that's great, you can replace all the gaskets and rubber parts while you are at it. You can also search to see if it looks like your DISA flap ended up in the intake or of anything looks like it has been ingested by the motor?

If I had to pay to have the intake removed, not sure I would do it at this point?

I am a bit worried about the noise you think is in the engine. Cleaning the intake ports will not likely resolve this issue? But you may find other issue when you have your car apart?

You may need a few mechanics to listen to your engine in person before you dive into this too much. Unforturnately if you ask 5 mechanics to listen to your noise, you will likely get 5+ ideas of what may be going on. But you may have someone give you a clue that you have missed and maybe will give you a better idea where to start?

Have you ruled out simple things like maybe wrong spark plugs (being too long of a reach)?

Good luck and I hope you make progress.
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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 11-30-2012, 06:22 PM   #411
alexandre0
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Quote:
Originally Posted by jfoj View Post
Last time I am going to state this, READ THE FIRST LINK BELOW IN MY SIGNATURE.

If you are using a smart phone you will not see signatures, you need to use a computer.

Once you are finished reading the first link in my signature for about the 3rd time, you will start to understand!

DISA built in O-ring seal is garbage!!

AutoRX is no Seafoam.

You might just want to replace your oil pressure sender first. I have had half a dozen cars with oil light/low pressure and every one of them was a bad sensor/sender. I even had one that would show no oil pressure for the first mile on cold start below 50F. I knew from the sound of the engine this was not the case. Once I hit the 1 mile mark the gauge jumped from 0 to the half way point. Changed the sensor after 2 years as I was lazy and it was hard to reach and no more 0 oil pressure on cold starts!
Oil pressure is 30k old... PO changed it.

I was strongly suspecting the DME since I have a ZHP and all the DME revisions for the modified 3.0L engine prior to the latest in '08 had some sketchy issues with idle and hesitations. I updated it last weekend and it didn't fix my cold startup issues (hesitations are pretty much gone though). I ordered the DISA o-ring as it was 5 bucks and you said OEM o-ring was garbage so I'm sure it won't hurt to change it. While I am waiting for that to show up I also tried to unplug whatever sensor there is in the 1.5" large hose that goes from the SAP to the engine. It started up real smooth after replicating the conditions where I've had issues - when the car sat in a heated garage for 5+ hours. I wasn't suspecting the SAP since I had zero SES codes and I knew I had to update my DME... But now I have an idea where to look at least. I'm hoping it's not the pump itself but the valve or a damaged hose.

I'll post an update once it gets a bit warmer here and I can work outside. No garage at home and 10 F today.

Thanks for the super useful thread

Last edited by alexandre0; 11-30-2012 at 06:22 PM.
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Old 12-13-2012, 05:30 PM   #412
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ok, i just got the 0171/0174 codes yesterday while the 330 was warming up, cleared them and they did not return all day or evening
then this AM the same codes plus 301/302/303 , same thing cleared and never returned

wouldnt a cracked intake tube cause the lean codes always?

so i need to look at the disa valve condition and the ccv as well? just at 1229XX miles, i dont think the ccv or disa valve have been done.
wasnt in the car when it threw the codes[on call and on the fone inside while it was warming up]
so not sure about idle quality or other indications at the moment, but it still runs great when i get in and go.

guess i will have to start using the landcruiser every day till i get a chance to dig into this :-( too cold and no garage.
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Old 12-13-2012, 06:01 PM   #413
jfoj
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Lower CCV oil return line DISA are most likely candidates.

You have a 330 not sure what year, you may not have the vacuum controlled SAP diverter valve??
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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 12-13-2012, 07:03 PM   #414
Stingray230sx
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Quote:
Originally Posted by jfoj View Post
lower ccv oil return line disa are most likely candidates.

You have a 330 not sure what year,
2001
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Old 12-13-2012, 07:42 PM   #415
jfoj
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2001 330 should have the vacuum controlled SAP diverter valve, so the vacuum hose that runs around the passenger side of the valve cover and behind the engine are often broken.
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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 12-15-2012, 11:04 AM   #416
chillinhardinanE46
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I am trying to fix a rough idle/ stumbling when coming to a stop problem on my car. I have changed spark plugs, valve cover gasket, vanos seals, air filter,DISA valve, cleaned MAF, cleaned ICV, cleaned Throttle, cleaned connectors to all of these items where applicable. Im guessing its something not having to do with my air intake. I will also be using some Lucas Fuel injector cleaner on next fill up... but in the meanwhile..


when looking to find a bad coil/boot/spark plug would you guys unplug the coils one by one while the engine is idleing or shuld i disconnect one.. turn on the car... observe ... turn off the car... plug back in.... unplug another one .. turn car on... observe.. etc..
which route would be the safest/least stressful for the car?

I also noticed my car (M56 engine) has another MAF on the exhaust side. I wasnt able to get this one cleaned becaise the tube had a one time use clamp so i didnt want to mess with it until i got one from BMW.

Last edited by chillinhardinanE46; 12-16-2012 at 02:11 PM.
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Old 12-15-2012, 11:04 PM   #417
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For these cold start issues I haven't heard anyone mention the VANOS seals. From what I gathered that is generally the issue with stumbling or dying on cold starts?
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Old 12-16-2012, 06:53 AM   #418
jfoj
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VANOS seals may play into this a bit and this is mentioned in the very first post, however, I personally believe that VANOS seals are more of an issue above 2000-2500 RPM. What I think happens is people replace the valve cover gasket and possibly the CCV and the broken SAP vacuum hose when replacing the VANOS seals and their cold start issues are resolved, not due to the VANOS seal, but do to the ancillary vacuum leaks that are either purposefully corrected or corrected due to the valve cover replacement.

I would bet that 95+% of the cold start issues can be resolved without VANOS seal replacement.
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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 12-19-2012, 09:42 AM   #419
Viktimize
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Quote:
Originally Posted by jfoj View Post
VANOS seals may play into this a bit and this is mentioned in the very first post, however, I personally believe that VANOS seals are more of an issue above 2000-2500 RPM. What I think happens is people replace the valve cover gasket and possibly the CCV and the broken SAP vacuum hose when replacing the VANOS seals and their cold start issues are resolved, not due to the VANOS seal, but do to the ancillary vacuum leaks that are either purposefully corrected or corrected due to the valve cover replacement.

I would bet that 95+% of the cold start issues can be resolved without VANOS seal replacement.

Hmm. I am having cold start issues with my sedan. It stumbles and dies unless I keep it up to 2000rpm for a minute or 2. Only does it on really cold mornings. I have replaced virtually everything that causes vacuum leaks so far, only thing left to check is the SAP line. If that doesn't solve it then VANOS seals it is.
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Old 12-19-2012, 10:56 AM   #420
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I would bet your VANOS seals are not your problem, but it never hurts to change them.

If you have a 2003 330 you should have a vacuum controlled SAP, if your big hose from the air pump to the diverter valve has standard hose clamps, then the diverter valve has a vacuum port and the hose is likely broken along the valve cover in MANY places.

BTW the SAP system sends vacuum to the diverter for up to 90 seconds on cold starts. So this may be your 1-2 minute issue?

What are your fuel trims when the engine is warmed up?

Please explain what you have replaced so far as you said you have replaced "everything" that could leak vacuum.
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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; 12-19-2012 at 10:58 AM.
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