Rough running - no vacuum leaks

[ThePocketGT]

My e86 3.0si 2007 has started running rough and burning through petrol. The Ecu has thrown the following codes;
02D5A monitoring motor torque,
02c7f lambda downstream,
02c2c lambda upstream of cat,
02c2b lambda upstream of cat,
02d06 air mass system,
029f4 cat conversion.

Smoke test has been complete and no vacuum leaks found. What else could throw all these codes, has anyone experienced similar?

The lambda sensor downstream has been changed, when I clear the codes occasionally 02c2c, p2c2b, 02d06 and 029f4 appear.

The only upgrade is the Afe stage 2 intake which has been on for 11 months. Car is a daily and typical covers 250 miles a week.

 

[bigwinn]

have you run INPA rough running to see if its a specific coil or bank giving you issues?

 

[ThePocketGT]

have you run INPA rough running to see if its a specific coil or bank giving you issues?

I haven't got access to INPA.... only a carly

 

[bigwinn]

where you based bud? someone will have INPA near you

 

[ThePocketGT]

where you based bud? someone will have INPA near you

I had a quick look online and see they aren't that expensive to purchase. I guess it needs to be run on windows xp rather than windows 10

 

[bigwinn]

yeah find an old laptop thats still got XP on it

 

[smorris_12]

FWIW, INPA works fine on Win10

 

[colb]

Increased fuel consumption is probably down to high fuel trims as going by the fault coodes you have one or more of the componants is not working or not working correctly, we are talking pre cat sensors and the Maf as probable culprits. Since you have already ruled out any air leaks the next move would be a good diagnostic scanner capable of viewing fuel trims, and exhaust sensors and Maf in live data may well pinpoint whats the root cause of your issues.

 

[Special Kay]

Increased fuel consumption is probably down to high fuel trims as going by the fault coodes you have one or more of the componants is not working or not working correctly, we are talking pre cat sensors and the Maf as probable culprits. Since you have already ruled out any air leaks the next move would be a good diagnostic scanner capable of viewing fuel trims, and exhaust sensors and Maf in live data may well pinpoint whats the root cause of your issues.

Colb you sound really knowledgeable

 

[ThePocketGT]

Increased fuel consumption is probably down to high fuel trims as going by the fault coodes you have one or more of the componants is not working or not working correctly, we are talking pre cat sensors and the Maf as probable culprits. Since you have already ruled out any air leaks the next move would be a good diagnostic scanner capable of viewing fuel trims, and exhaust sensors and Maf in live data may well pinpoint whats the root cause of your issues.

thank you. I'm hoping its one of those components rather than failed manifold cats. Manifold cats are no longer available....

 

[BumpyZ4]

Disconnect the MAF and see if the engine runs smoother. With the MAF unplugged the DME will revert to a default program. If the MAF is bad it should run better (although not great) with it disconnected.