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General E46 Forum
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Old 10-26-2012, 03:27 PM   #1
Nicks330i
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E46 330i bank 1 & 2 lean

Hi guys I been having this problem for a while and I saw many people yelling me its the oil separator so I whent ahead and replaced that with all the vacuum hides that are connected to that and the canister but the problem is still there has any body run into the same problem? If so how did you resolved it.
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Old 10-26-2012, 03:29 PM   #2
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Search for jfoj, he has a comprehensive thread on such codes and there's a lengthy discussion. Could be Disa, could be a tear in the intake boot, could be a lot of things.
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Old 10-26-2012, 03:29 PM   #3
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Two systems are the likely culprits for these codes:

FUEL


&


VACUUM



Address both. See sig, click 3rd link entitled JFOJ, do it. Hit the back button, see sig again--do it all!

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Old 10-30-2012, 12:04 AM   #4
Nicks330i
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After reading the post I'm deff testing the disa valve does any body know how to test the engine vacuum purge valve?

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Old 10-30-2012, 04:36 AM   #5
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I had the same codes and it was my lower intake boot was torn and had a vacuum leak.
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Old 10-31-2012, 03:15 PM   #6
Nicks330i
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Well I just replaced this items
Upper and lower intake boot
Oil separator and hoses that connect to it
Vacuumhose that connects the intake and the canister
And replaced the fuel filter

After that I turned on the car spray some carb and choke cleaner to make sure I didn't miss anything and today I reseted the check engine light well see what happens. I'm hoping this fixes the problem other wise I'm looking into the Disa or the vaccum valve that's under the front of the intake manifold.

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Old 12-12-2012, 12:43 AM   #7
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Ok getting back to me problem after replacing the intake hoses, PCB and all the vacuum hoses I still have the lean codes so I switched my idle air control valve but I'm still getting the codes, oh I forgot I tested the disa valve and it was good

When I start the car it idles righ but the I get sporadic idleing would it be the fuel pump, I was maybe thinking the jet sucking valve that is connected to the brake booster, intake hose and the back of the intake or might it be the valve that is under the intake right behing the oil filter housing.

Any suggestions?????

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Last edited by Nicks330i; 12-12-2012 at 12:44 AM.
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Old 12-12-2012, 05:20 AM   #8
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See 2nd link below in my signature for fuel pump issues, however, if you are getting your CEL at idle, then you problem is not likely a fuel pump issue.

You have missed a problem somewhere unless you or someone have replaced the MAF with a non OE style MAF.

If you have a scan tool that reads out fuel trims, this would be helpful.

Intake path or crankcase air leaks are your likely problem.

You have to methodically check and change most of the plastic and rubber parts out. Did you replace the lower CCV oil return hose that connects to the dip stick?

Did you check to make sure the CCV side vacuum port was plugged if you did not need the port?

Did you check all the hoses under the rear of the intake?

Did you check the DISA and replace the O-ring?

What codes are you specifically getting and when does the CEL come on, idle or cruising? Do you get any misfire codes as well?
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