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Failed Annual Mot Inspection Due To High Lambda

etang789

By etang789,
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etang789 Community Regular

etang789

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Posted

So in HK they have been really strict recently with MOT.

I already have installed a brand new 400 cell cat, and my lambda value is at 1.213 which is out of the range of 0.97-1.03 .

How am I suppose to fix this? Will my new Haltech with proper tune fix it?

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

is the Haltech already in and also do you have a wideband wired back into it?

If so, you can easily enable O2 feedback and setup the lambda or desired AFR for the load vs. RPM then setup the PID for the O2 feedback.. You'll pass with flying colours.

etang789 Community Regular

etang789

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Posted (edited)

Crimp off return line to raise fuel pressure.

So you mean my current fuel pressure is too low and causing running lean?

is the Haltech already in and also do you have a wideband wired back into it?

If so, you can easily enable O2 feedback and setup the lambda or desired AFR for the load vs. RPM then setup the PID for the O2 feedback.. You'll pass with flying colours.

The Haltech is not installed yet.

Edited by etang789
  • 1 month later...

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