Mag's OSE 12P Thread

[mag]

Thanks Holden202, my mistake thought default ment set in base code & only changed if migrating a cal that included particular parameter. Agree have myself been using TP to edit & TP5 only for logging for same reason. Probably should let TP man know if he has not benn already informed. Something that needs fixing.

Have logs, a hint as to what to look for in the log regarding checking lean/rich off idle & small throttle openings. Running ve learn, should I use blm mode first to check how close ve table is.

[Dec_head]

I have to check mine i am running 102 but it seems to have a flat spot you can feel with light acceloration like it is hesitating after running it with ve learn for a while.
Is that similar to your problem ?
When i put the tune i started with back on it went away it might be something else entirely though knowing me lately overlooking things .

[Holden202T]

just make sure its not accelerator enrichment

[Jayme]

got any logs taken while the car is VE learning and capturing this stumble as well? it would really help you to dianose it if we could see your current cal and a log of the problem occurring and ve learning.

[mag]

Can do, although I did not use the adx that came with v104, so would need to upload the adx I used. If this a problem I can get a log tomorrow using v1.04 adx.

Also been looking at the log of the o2 sensor output voltage & notice that although it varies from <0.3 to >0.6 volts in a cyclic pattern it is very non uniform even when the load remains pretty constant. What sort of o2 output pattern should I get. How do you determine if the o2 sensor is stuffed or going that way.

[Jayme]

its no problem, just post the adx you used along with the log, when the engine is operating in closed loop and is pretty close to the right mix the pattern should be pretty uniform and constant, just up and down sawtooth pattern.

[Dec_head]

My problem isn't noticable when cold if at all as it warms up it is worse yes
Is yours ok when you go back to your base tune before running around with ve learn enabled
Mine is most likely self inflicted stupidity but it would be good if it isn't and a simple fix.

[mag]

Jayme, sometimes get nice sinewave type cycling but quite often very jagged multipeak +ve/-ve that does not pass through 0.5 volts. Get continuous >0.6 volts when drops out of closed loop during power rich, which sorta says its working but also many small oscillations <0.3 V for longist periods in closed loop. Looks a lot like may be a bad connection somewhere. Might explain my ve learn issues although dud o2 sensor would not cause hot off idle stumble.

Logs etc attached.

Dec_head, have yet to try base tune with no ve learn, but have changed "AE temp factor vs coolant temp" to match the values from the original vn tune. May be this will help. Will decide what to try next depending on what comes out of the funny o2 output. Cannot blame ve learn if the feedback signal is stuffed.

[yoda69]

If it is happening down low and at soft launch have a look at the AFR around idle.

Have a look at the following AFR Tables:
Map A: A/F Ratio - Idle A/F Ratio vs Coolant Temperature
Map A: A/F Ratio - Cold Engine A/F Ratio vs Coolant Temp and MAP
Map A: A/F Ratio - 20-100kPa Air Fuel ratio vs RPM and MAP

It maybe a long shot, but have a look at the the AFR transistioning out of idle.
When it is at normal operating temp (assume 92C) it jumps from 13.8 to 14.7 and when cold (20C) to 13.6.

May find that the depending on the VE accuracy at idle as it jumps out of idle to stoich at small throttle inputs there it leans out if VE is incorrect and too high or goes rich if VE is too low and bogs down(couldn't get log to work to confirm)
When the engine is cold it stays in open loop and goes from 13.8 to 13.6, so effectively no change.
What O2 mV readings or WBO2 readings are you getting at idle?

The VE value at 1000RPM and 40kPa also look a little suspect compared to a standard Holden VN bin and also to surround cells.

As a test you could try:
1. Change the normal temp AFR's of 14.7 around the idle RPM/MAP point to match that of the idle AFR 13.8 and see if it is still happening.
2. Try and change the value in the 1000RPM/40kpa cell to about 65kPa.


Good Luck

[mag]

yoda69, thanks for the comments. o2 sensor output goes 800mV during idle. Actually does high before afr shifts to idle value, assume that is feature of the code.

All ve/afr values have been lifted from my factory vn tune which worked ok. Will try yours suggestions & shift normal afr values around idle map/rpm to match idle 13.8, once I have tested AE vs coolant temp table change.