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Rough running - no vacuum leaks
- ThePocketGT
- Member
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- Joined: Sun Mar 15, 2020 10:29 pm
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Rough running - no vacuum leaks
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.
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
- Lifer
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Rough running - no vacuum leaks
have you run INPA rough running to see if its a specific coil or bank giving you issues?
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- ThePocketGT
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Rough running - no vacuum leaks
I haven't got access to INPA.... only a carly
- bigwinn
- Lifer
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Rough running - no vacuum leaks
where you based bud? someone will have INPA near you
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- ThePocketGT
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Rough running - no vacuum leaks
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
- Lifer
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Rough running - no vacuum leaks
yeah find an old laptop thats still got XP on it
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- smorris_12
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Rough running - no vacuum leaks
FWIW, INPA works fine on Win10
------
Scott
Where are we going and why am I in this handbasket?
2006 Z4 2.5si Silbergrau und rot
Scott
Where are we going and why am I in this handbasket?
2006 Z4 2.5si Silbergrau und rot
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Onlinecolb
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- Location: Newport, South Wales UK
Rough running - no vacuum leaks
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.
Z Shed Cymru member
1999 1.8 Z3
2003 2.5 Z4
1998 Honda Deauville 650
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1999 1.8 Z3
2003 2.5 Z4
1998 Honda Deauville 650
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Rough running - no vacuum leaks
Colb you sound really knowledgeablecolb wrote: ↑Fri Nov 11, 2022 11:25 am 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.
- ThePocketGT
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Rough running - no vacuum leaks
thank you. I'm hoping its one of those components rather than failed manifold cats. Manifold cats are no longer available....colb wrote: ↑Fri Nov 11, 2022 11:25 am 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.
- BumpyZ4
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Rough running - no vacuum leaks
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.
2003 E85 3.0i Sterling Gray
KLR 650
Diva Roadster (Kit Car)
KLR 650
Diva Roadster (Kit Car)