Failed Annual Mot Inspection Due To High Lambda

[etang789]

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?

[Ben C34]

A tune.

A cat doesn't fix that.

[etang789]

Problem is I wont be able to tune it before I can pass the MOT... any ideas?

[Missileman]

ask for an extension

[Ben C34]

Crimp off return line to raise fuel pressure.

[Dose Pipe Sutututu]

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]

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 May 18, 2015 by etang789

[Ben C34]

Could be. Or a massive amount of other reasons.

[Dose Pipe Sutututu]

install the haltech, I'll put together a base map for you with o2 feedback enabled - but you need a wideband connected to it.

[etang789]

Ok finally pulled an all nighter and installed the Haltech Platinum Pro PnP with Haltech Dual Wideband, now the car starts and running with the base map.

I wonder if the base map will pass the emissions.

[djr81]

It would be miraculous if it did.

[Ben C34]

Wideband are so cheap. You should have one.

[djr81]

Whereabaouts in HK can you get a tune done? Ive only every seen places like this:

[etang789]

thats why I am asking a lot of questions here and DIY with the help from CRD and using TeamViewer to remote tune

Edited July 6, 2015 by etang789