Hi guys, I need some help. I recently completed carbon blasting using the fine instructions posted here. After reassembly, I got a CEL for code p0441 & a reduced power light. While checking hose connections, I found a fitting at the rear of the intake manifold with no hose, but no loose hose to plug into it. I believe it's a purge hose (not sure) but does anybody know where the other end is? I'll try to attach some pics. The fitting with the red cap on it is the one in question. Thanks in advance for your ideas. 2009 Mini Cooper S, 6 speed. 73K miles.

 

Hopefully the pictures attach this time.

 

Do you have a PCV hoses going from the rear of the valve cover connected to the intake where you pictured? You have your other PCV hose from the valve cover to the turbo pipe right?

Could you please get a photo of the valve cover and its surroundings?

 

Thanks for the reply. Yes, the rear PVC hose is attached to another valve under the intake. The front PCV hose is attached as stock. In fact, everything is stock except the K&N air filter. This fitting is at the top rear of the intake manifold, close to the firewall, just below the noisemaker hose. It's visible in the attached photo (the one with the hand visible) with the red cap still on it. Despite looking from both top and bottom, I can't find a loose hose. I'm thinking about pulling the intake again if I don't find it soon. I'm hoping this post will prevent that.

 

Do you remember when disassembling the intake seeing that orange plug or did you just find it open without the orange plug? I can't think of anything else that would need to be plugged in there at the throttle-body.

I just had a look at my Bentley Manual and it only shows the two PCV hoses, third is plugged. I wonder how many hoses the N18 have connecting to the throttle body, well it's not a throttle body and is only used during warm-up. N18's have the Valvetronic head.

 

I don't remember a plug. I had this disassembled for a few weeks and I plug fittings as I disassemble due to all the dust we have. Then I unplug during reassembly to attach hoses so I could have unplugged it to get it ready for the hose, not realizing there is no hose. I didn't find an extra plug though, & I looked. I guess I'll plug it and try it out. Thanks for your help. I couldn't find any info on this & I don't have another Mini to look at.

 

I believe its suppose to be uncovered, take a picture think its sealed off half way back into the intake.



https://www.northamericanmotoring.co...se-delete.html

If you have the PVC delete mod it looks like this.

 

Thanks to both of you for the suggestions. Since I do have a vacuum leak, I'm going to plug it & see what results. If it's already blocked, no harm done. If not, it could fix it. I'll let you know what happens.

 

Plugged the fitting last night, completed reassembly and took it for a drive. Still in limp mode, still have a CEL. (Disconnecting the battery on my car has NO effect on the ECU codes.) Same condition after a 20 minute test drive. Car runs reasonably well in limp mode, by the way.

On the drive to work this morning, the "half engine" light goes out, the car suddenly has full power. Runs well the remaining 20 miles to work. I still have a CEL, but I suspect it will go out in a day or 2.

So this appears to have fixed the problem. If it reoccurs, I'll post again. Thanks a lot Systemlord, I would have looked for a lost hose for hours, never thinking that it was factory plugged.

By the way, I'll bet ECSTuning is also correct in that on some cars this is NOT drilled through. By not drilling it then capping it they probably save a couple cents per car, which adds up when you make a few million of them.

I appreciated the input from both of you. It's always nice to have options.

 

Possible "pressure conventer"?location under intake manifold.Broken part or forgotten some vacuum lines re-assembly?Lot of boost problem issues of this.

 

Sorry for the old thread resurrection but THANK YOU!! That's exactly the question I have; I just replaced someone's throttle body and I couldn't find the "missing" hose for this. I'll cap it off just in case.
Sadly there is probably another cause for the CEL then; I thought I was on to something

 

Did you change the gasket for the throttle body?

 

No.
I am now worried. Is that necessary?

 

Could be. What error code did you get?

I just changed mine and got new gaskets cheap on rockauto.

So you just reused the old gaskets?

 

I get P129E which is like "unusual manifold pressure reading" which some people say could be because of boost leak, which a bad gasket between the throttle body and intake manifold could be.
Yeah I didn't even notice a gasket, i just pulled the old TB off and put the new one on

Now, I'm not 100% that that particular CEL doesn't predate this TB issue but I'm fairly sure of it since the owner brought me the quote from the dealership and the throttle body was the only thing that NEEDED to be replaced

 

Here is the gasket. I think you only need one.
https://www.rockauto.com/en/catalog/...dy+gasket,6474
Back to the original topic of discussion.... The guys at the mini dealer had no idea about this third port in the intake and why it was there.

I plugged mine with a rubber cap/plug thing I found under the car when swapping motors . I have no idea if I need to plug it or where the hell the cap came from. I'm not even sure if the port is open to the atmosphere or not. I wasn't paying attention to it when I had the intake in my hand.

Can you cancel the error code? Do you have a scanner?

 

I have the part on order and I'll do the job again, this time with a new gasket, this weekend.
I've cleared the code and the first time I drive it the CEL stays off. Once I restart the car there it is. NOTE: apparently the car needs to be RUNNING before they can find the code. I took it to one place that said there was no code in there and the guy walked back in. The next parts store guy was more interested in doing a good job though and he and I discovered that we needed to start the car.

 

I found this thread because I, too, noticed that I had a vacuum connection that was missing a vacuum line. Someone on this thread suggested that the tubular extension might be factory blocked so I checked a spare intake that I have on the shelf. I looked with a flashlight and used a thin rod and can confirm that on my intake, the tube does not pass thru to anything. Hard plastic blockage at the base of the tube. It does not need to be capped or plugged.

Why it’s there is still a mystery that only a few engineers at Peugeot might know the answer to.

 

Good to know! Must be for another application or the French engineers had too much wine at lunch.

 

Yep, shared parts with the Peugeot and Citroen engines, then they just knock out that hole for the brand that is needed.

 

My n18 manifold has what looks to be a missing hose, but the port is sealed inside. It’s right next to where the purge valve connects to it. It’s totally normal

 

I can confirm mine is like this too on a 09’ JCW. I just got done taking out the plastic tube from the PVC to the intake manifold since it was fairly brittle plastic and spotted the same thing.
Thanks to folks responding here, I thought I was missing a hose or maybe it went to different intake setup.

 

Hello put that plug there just a show or is that how it is. i have the same question

 

Dont understand your question.

 

I think it is the port used if you have the cold climate package. The PCV hose on the on the previous motor would run to there to prevent throttle body freezing. Guessing this probably is still an option in the N18 seeing as there are intake boots without the PCV hose port.