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

1376 Views 13 Replies 5 Participants Last post by  alfizta
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?

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The ECU can make adjustments to compensate for certain fault conditions and within certain limits. The car may run but probably not quite right. This is why cars often run better after an ECU reset as they go back to a default "safe" map but slowly return to how they were becasue the original fault is still there.
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