Z22SE standard lambda readings on opcom

identiti66

Asking for a pal.. he's got emissions issues and think it's lambda related..

This is the query.....

*Noticed something odd going on with the lambdas I know one of them fluctuates LEAN / RICH ...

But does the other because mines stuck on RICH even with ignition off*

Highlighted in red the one which is stuck on RICH ....

are those reading fine for a Z22SE ?

Johnss

Should have recorded the data with [Record] button in bottom left corner..

identiti66

Yeeeeah... I'm an opcom novice and this isn't my data. Is there nothing that can be deduced from the info given?

evocarlos

i found that once the sensors are up to temp and idle running both the Mv of the 2 sensors is within 50-100mv
b1s1 - 850
b1s2 - 800

marks152

Your front readings at idle or constant RPM with the engine upto temperature and the system in closed loop should be reading 0.1v - 0.9v and cycling continuously between the two figures.

Your rear sensor at idle/constant RPM should be a steady voltage without too much variation.

identiti66

Thanks so far chaps... next question

Can you ask if the sensor 2 ( after cat ) should read rich or lean as I now know sensor 1 is defo rich/lean .

marks152

Its more the voltage your looking at. with the engine warmed up:-

Connect to the engine, Go to measuring blocks. Click RECORD, SAve file to desktop. Then allow the car to idle for 1 minute, Then hold revs on 2k for 1 minute. Then press SAVE. Upload the file so I can see it and make some graphs.

Daz86

i had Similar problems here's my thread Evo Carlos attached data reading for me

https://z22se.co.uk/threads/lambda-sensor-question.27035/

Might help you out

Kb1974

http://opcomusers.org/forum/index.php/topic,1170.0.html

Have alook at these above readings.