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Discussion Starter · #1 ·
I'm trying to nail an air leak. I'm convinced of it. But not sure where it is. Intake or exhaust...

ECU has been able to adapt by at least changing TRA parameter to the lowest limit. p1172 pops, then engine runs almost perfect. Idle jumps once in a while, could be pullling better, but goes well on emissions. Lambda is OK! MAF too.

Have reset TRA parameter, ECU still adapting, so I'm getting always Lean condition on bottom limit.

I'm thinking that if I have an exhaust leak lambda sensor will always get too much oxygen, so it would be impossible to get nice lambda graphs like I'm used to get. Intake air leak, then. Am I right?

But, anyway, is it possible for the ECU to adapt to an exhaust air leak?

THANKS!
 

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Discussion Starter · #6 ·
MOT no sweat here too 2 months ago. So, lambda fault dropped. It's original Bosch btw. I just wanted to know if the ECU can "disguise" an air leak in the exhaust (before the lambda sensor) by adapting the TRA parameter or others?...
 
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