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Old 12-11-2016, 11:12 AM   #61
Dave1027
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Quote:
Originally Posted by mattthecoxcomb View Post
Having done O2 Pilot mod today, I noticed the following: while it is possible to connect a vacuum line to the capped CCV port without removing the throttle body on standard CCVs, for the winterized CCV (which is wrapped in foam insulation), I found that getting to the port required removing the throttle body. Certainly not deal breaker for anyone competent enough to do this job, just something to be aware of if anyone is having trouble.

That said, I am having trouble of my own. During the course of this mod I took apart the intake system down to the manifold. I cleaned the throttle body and the idle control valve with carburetor cleaner. I inspected the intake boot segments and they were free of cracks. I did not replace the O-rings for either the throttle body or the DISA as these were replaced in March when I removed the entire manifold to replace the CCV. I got everything back together but when I started my car afterward the dashboard lit up like a Christmas tree with EML, SES, and traction triangle lights (!). The idle also fluctuated wildly from 400 to almost 1,400 RPM. The car is not driveable in this condition.

I connected my code reader which indicated lean codes for both banks as well as throttle position sensor errors. I'm thinking this must be an intake leak somewhere and admittedly I kind of rushed putting the intake boot sections/airbox back together--which makes me think maybe some section of the boot isn't properly connected. Either that or the throttle body and DISA O-rings need replacing again. Are they single-use items like some crush washers? Did anyone else have any such hiccups doing this mod? At this point my plan is to tear down the intake back to the throttle body again and rebuild more carefully, just wondering if anyone had similar problems with this. Also wondering if maybe my cleaning of the idle control valve or throttle body could have damaged either--I used the same procedure as in March and had no problem then. But the throttle position sensor code concerns me. Lean codes--almost definitely a leak in some rubber or plastic part. But the throttle position sensor code--could I have messed up the throttle body?

Also, any possibility the new vacuum line running from the CCV to the unused port on the manifold (the O2 Pilot mod itself) is the cause? I'm just disturbed because the last time I did this I took off the whole manifold, which was a much bigger job (involving disconnecting the fuel rail etc.) and the intake tract went back together without issue. Please help!
I've already posted that the 02Pilot mod is a simple 20 minute task where nothing is removed but the cabin filter housing and the plastic belly shield. You never had to remove the throttle body or any of that.
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Old 12-11-2016, 08:54 PM   #62
mattthecoxcomb
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Thanks for the input and feedback everyone.

So I got it working. I think I didn't tighten all the hose clamps fully and that was causing an intake leak and lean codes. I buttoned everything back together and started her up and no longer had lean codes but still had the P0123 and P0222 throttle position sensor codes. I pulled it apart for a third time and brilliantly found that I had forgotten to reconnect the wiring harness to the throttle body. Brilliant.

Lesson learned: don't rush reassembly.

Now that the O2 Pilot Mod is hooked up and hopefully creating more crankcase vacuum, I will report on my oil consumption as appropriate. Thanks again!
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Old 12-11-2016, 09:00 PM   #63
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Originally Posted by mattthecoxcomb View Post
Thanks for the input and feedback everyone.

So I got it working. I think I didn't tighten all the hose clamps fully and that was causing an intake leak and lean codes. I buttoned everything back together and started her up and no longer had lean codes but still had the P0123 and P0222 throttle position sensor codes. I pulled it apart for a third time and brilliantly found that I had forgotten to reconnect the wiring harness to the throttle body. Brilliant.

Lesson learned: don't rush reassembly.

Now that the O2 Pilot Mod is hooked up and hopefully creating more crankcase vacuum, I will report on my oil consumption as appropriate. Thanks again!
I was going to say. Something was not plugged in. Glad you found it. Pay more attention!!
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Old 12-11-2016, 09:22 PM   #64
lingon300k
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Originally Posted by mattthecoxcomb View Post
Thanks for the input and feedback everyone.

So I got it working. I think I didn't tighten all the hose clamps fully and that was causing an intake leak and lean codes. I buttoned everything back together and started her up and no longer had lean codes but still had the P0123 and P0222 throttle position sensor codes. I pulled it apart for a third time and brilliantly found that I had forgotten to reconnect the wiring harness to the throttle body. Brilliant.

Lesson learned: don't rush reassembly.

Now that the O2 Pilot Mod is hooked up and hopefully creating more crankcase vacuum, I will report on my oil consumption as appropriate. Thanks again!
Glad you got it sorted. Hopefully your oil consumption goes down, too.
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Old 03-01-2017, 05:30 PM   #65
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I have an M54 engine with increasing oil consumption and read this thread with interest. In summary, is it safe to try the 02Pilot mod? Meaning that it won't hurt the engine or pose any risk to the mechanicals of the car? And exactly how much do I need to remove to access the ports for the new vacuum line? It didn't seem clear from the post. Thanks!


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Old 03-01-2017, 05:46 PM   #66
Dave1027
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Originally Posted by egruber View Post
I have an M54 engine with increasing oil consumption and read this thread with interest. In summary, is it safe to try the 02Pilot mod? Meaning that it won't hurt the engine or pose any risk to the mechanicals of the car? And exactly how much do I need to remove to access the ports for the new vacuum line? It didn't seem clear from the post. Thanks!
I have been running the 02Pilot Mod for two years without any adverse issues http://www.bimmerforums.com/forum/sh...lacement/page9

As I posted about three posts up (sheesh, doesn't anybody read any more?) you only really need to remove the cabin filter assembly to reach the vacuum ports on the back of the intake manifold and the plastic belly plate to reach the vacuum port on the CCV.

The DIY made by 50sKid that Lingon links to is nowhere close to necessary. He makes a 20 minute task into an all day job.
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Old 03-01-2017, 05:50 PM   #67
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Thanks for the reply. Sorry I missed your earlier post. I do try to not ask redundant questions. And I was referring to the 50skid post that made it look overly complex.


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Old 03-08-2017, 06:50 PM   #68
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I've read the increase in vacuum can pull oil into the air intake if you open the oil cap while the engine is running. Not seeing how that would happen.
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Old 03-08-2017, 07:37 PM   #69
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What vacuum line should we use? All the vacuum lines I've bought at the store fail within a week. They get soft.
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Old 03-08-2017, 10:07 PM   #70
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I've read the increase in vacuum can pull oil into the air intake if you open the oil cap while the engine is running. Not seeing how that would happen.
Doesn't really make any sense, as far as I can tell. Opening the oil cap should terminate the vacuum, not pull oil into the intake. The CCV would have to be full of oil, and that's not how it works.

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Originally Posted by e46alfonso View Post
What vacuum line should we use? All the vacuum lines I've bought at the store fail within a week. They get soft.
This: https://www.fcpeuro.com/products/bra...m-od-x-20mm-id

It's the same hose I linked to in the DIY. The best vacuum hose you can buy, in my opinion.
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Old 03-09-2017, 10:59 AM   #71
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What vacuum line should we use? All the vacuum lines I've bought at the store fail within a week. They get soft.
Fail? How so?

I used 28 inches of heavy duty 3/16 inch vacuum tubing I bought at the auto parts store. Been working fine for two years.
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Old 03-09-2017, 10:26 PM   #72
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Great write up !! I did mine in about an hour . Thanks a lot


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Old 03-11-2017, 02:28 PM   #73
alan53
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I have used the 02pilot mod for a year now,just before i was rapid flushing the engine with its normal oil as soon as it blackened i did maybe 6/7 oil changes and saw an improvement when that reached its peak i did the mod and my oil consumption has dwindled to 1/2 litre every 3 months thats about 2000 miles and seems to still be going down,so i am very pleased to be driving a normal car that i dont even need carry oil in the boot anymore THANKS TO 02PILOT,PS my car just turned 200,000 miles.(E46 330ci)

Last edited by alan53; 03-11-2017 at 02:31 PM. Reason: forgot to mention model
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