Spikey afr reading

[PBU]

I keep on getting very spikey afr readings but injector PW is rather steady ??
Engine is running not bad but not perfekt.
Using closed loop.



Should i change LSU4.2 settings or closed loop settings ?




Grts
Patrick

[Jadzwin]

Your engine is lean, especialy during transients.
It can't drive nice with such AFR

[PBU]

What are "transients" ?

[Jadzwin]

Transients condition during throttle opening. Look that spikes are when you move the throttle and acceleration enrichment appears.

[PBU]

Yes i see.

But remains the very spikey respons from the LSU.
I have the settings as standard from ecumaster.

Has anybody a log from there O2 sensor.

Grts Patrick

[Jadzwin]

Please send us this log file to tech(at)ecumaster.com

However try to reach the whole VE table (eg by 10%) for test.
The car should work much better

[PBU]

After some more testing and making the VE table richer and other things it is getting worse.
AFR gauge is jumping all over the place when cruising.
From 12-18AFR !!

Will try to post log this evening.

I wonder what can cause the AFR to jump so fast up and down when the car drives good and smooth ???
This is a brand new LSU 4.2 ( the 3th one )
Can you put a LSU in a place to cold, as it is in the bottom of the car. So getting a lot of cold air for the moment.

Can someone post a WBO log from a good AFR reading.

Grts
Patrick

[astra vxr]

whats the fuel map like ? can you post it up ?

looks like a bad mapping if its jumping that much providing wideband is ok

[Ace-Motorsports]

Make sure you don't mount the wideband sensor at such an angle that condensation/water can go in the sensor.

[PBU]

Make sure you don't mount the wideband sensor at such an angle that condensation/water can go in the sensor.

Almost vertical.

Of course it's sitting very low but i assume you are talking about condensation on the interior.