M42 Oil Consumption and 1222 code

[e3091318is]

How much oil does your M42 consume?  I had mine rebuilt about 8k miles ago and I go through about 1qt every 2000 miles using Mobil 1 regular 10w-40 oil.  Mostly highway driving crusing at 70-75 @ 3kRRPM (3.73 LSD).  I also have a slight issue with a 1222 code where my light comes on at idle after 10-15 minutes of driving.  I will exit a freeway and it drops to 1100RPM and wont go lower and then the Check engine light comes on but once I give it a touch of gas, it goes away.  Already changed the o2 sensor so I am guessing it may be a MAF, ICV, or Temp sensor.  I get decent gas mileage (28 average) and 30ish on the highway.

[Darky]

Where does the oil go? Blue smoke? Leak? Got to go somewhere.
Had to convert your volumes that's nearly a litre every 3000 km. Something's wrong.

[e3091318is]

Where does the oil go? Blue smoke? Leak? Got to go somewhere.
Had to convert your volumes that's nearly a litre every 3000 km. Something's wrong.

No smoke or leaks.  I think it is just blowing from the valve cover vent into the throttle body and burning away.  Not sure where else it could possibly be going.

[Darky]

You guys get emission tested every year?
That will be interesting!
But there is no way they use that much oil! Not normally anyway.
Block your valve cover vent for a bit and then check oil! If that's it then it's an easy fix.

[e3091318is]

You guys get emission tested every year?
That will be interesting!
But there is no way they use that much oil! Not normally anyway.
Block your valve cover vent for a bit and then check oil! If that's it then it's an easy fix.

I am not worried about the emissions tests, I get around that.  Are you sure it is a good idea to block that valve cover vent?  I think most of my oil is coming from that area of the system though.  I have some hoses under my manifold (the one that comes from my valve cover vent into the "Y hose" and goes into the throttle body) that does sweat quite a bit of oil.  Maybe the clamps were put on too tight and I think it damaged them.

[Darky]

Take a photo.
I'm taking about the rocket cover vent hose. Is that where you believe your loosing oil.
Maybe a catch can will sort it out, but we just need to identify where it is going.

[e3091318is]

Take a photo.
I'm taking about the rocket cover vent hose. Is that where you believe your loosing oil.
Maybe a catch can will sort it out, but we just need to identify where it is going.

Yes that is where I thought too.  The vent hole in the top front of the valve cover.  That hose goes to the mess under the intake and connects under the throttle body.  I was thinking of doing a catch can, but will that really "solve" the problem?  I am curious what is causing the excessive oil going out the vent in the first place.

[Darky]

It may not solve the problem but it will allow you to identify it!
Identifying any problem is hard part.

[Tgoode318]

1222 means the sensor has bumped up against the Full Rich or Full Lean condition and cannot be resolved. This could be the sensor itself, or it could be a vac leak, clogged icv, pcv, . Since you don't know that the sensor sees rich or lean, then you should put your meter on it to find out. A lean condition is likely a vac leak. But it dosn't sound like a vac leak since you are loosing oil.  Make sure you check your fuel injectors too for leaks. You can Try this oil die and see if you can see where all the oil is going!
http://www.eastwood.com/4-in-1-concentrate-for-leak-detection-kit.html?srccode=ga220010&gclid=CK7L8-6Nlb4CFWYV7Aod5wIAVA

[e3091318is]

1222 means the sensor has bumped up against the Full Rich or Full Lean condition and cannot be resolved. This could be the sensor itself, or it could be a vac leak, clogged icv, pcv, . Since you don't know that the sensor sees rich or lean, then you should put your meter on it to find out. A lean condition is likely a vac leak. But it dosn't sound like a vac leak since you are loosing oil.  Make sure you check your fuel injectors too for leaks. You can Try this oil die and see if you can see where all the oil is going!
http://www.eastwood.com/4-in-1-concentrate-for-leak-detection-kit.html?srccode=ga220010&gclid=CK7L8-6Nlb4CFWYV7Aod5wIAVA

I ruled out a vacuum leak when I had a smoke test done.  I get 28-30mpg on average so I don't believe it is a rich issue.   One thing that sticks out in my mind is my temp sensor (first one closest to the front of the engine).  It was the old one and I may have mixed them up from the e36 m42/e30 m42.  I may have put the e36 sensor in and from what I heard, a 1222 could be caused by a bad temp sensor and the ECU is reading the temp wrong which causes the car to idle high even when warm.

[taruns23]

I know it's a long shot, but my car has the same symptoms. Did you figure out what it was?