Mag's OSE 12P Thread

[Holden202T]

one thing i have noticed looking at the logs with 2 bar sensor .... when it goes to 100kpa in my case its going to 106kpa and hense is using the boosted afr table which mine has all been set to 11:1 .... so it might be worth putting the 100kpa AFR table values into the first one or two rows of the boosted afr table just to keep it happy.

[mag]

Been looking at 1 & 2 bar bins code & have question as to why winmerge cannot find a difference between the codes. used same base & changed only 1 bar set bit. disassembled both 1 & 2 bar bins using same process & then used winmerge to find difference. expected at least to detect the set bit but nothing.

[Holden202T]

theres no need to disassemble anything ... the code is all there for 1, 2 or 3 bar all you do when you change the bar settings is to change cal data then the code uses the settings accordingly to run the right code to suit.

ok this is the results i get from opening my 1 bar tune, changing it to 2 bar, saving and then comparing the two files.


oh and in real terms thats 800C offset.

[mag]

did not realise TP had such a function, still learning. anyway TP diff tool thinks the 2 bar bit is set which is all I wanted to confirm before loading bin for test run. will retrace the drive used to get the last 1 bar log so should give a starting point for comparision od 1 & 2 bar bins.

[delcowizzid]

like holden 202 said try putting your 100kpa spark and ve into the 100 kpa colomn of the 100-200kpa tables

[Holden202T]

i'd go one step further and put it into the 100 and 110 cells!

[mag]

have loaded 100 kPa AFR/VE/SA data into 100/110 kPa boost tables, will test run later today. Have been for 150km run this morning with 2 bar setup. again get AFR changing whenever MAP values exceed approx. 60 KPa.

also any step change in throttle position can cause the AFR to change, this has aways been the case but up until now had not thought to mention it. the bigger the throttle step & the higher the prevailing MAP value, the bigger the AFR change.

scale MAP values etc look to be sensible, only AFR doing strange things.

checked that difference between 1 & 2 bar bins was only bit set for 2 bar before loading 2 bar bin into NVRAM. read 2 bar bin from ecu checked against 1 bar bin that only difference was still bit set for 2 bar. this test should confirm that bins are not being corrupted when loading into NVRAM.

[VL400]

i am away for another 2 weeks so cant test it. But try using the scannerpro adx instead, some of the tp5 files had the wrong conversion for the map and load variable.

[mag]

VL400, hope its a holiday your having & not work. Will await your return, have reverted to the 1 bar set-up as it gives a very driveable car once warm. needs a little fine tuning for cold engine off idle response and idle stability after hot start, but otherwise no issues.

[VL400]

Done some testing. In the standard V8 cal the target AFR changes from 14.7 to less than that after 80kPa. Setting the cal to 1 2 or 3 bar MAP sensor it behaves correctly and starts to get richer after 80kPa.

I also confirmed that the MAP scaling and calcs are correct. Set the MAP to 50kPa which is a voltage of 2.1 volts as measured by a multimeter

As far as the ECM is concerned the 2.1v gives 50kPa, 92kPa or 132kPa depending on the sensor selected. Displaying the scaled voltage used for 1 bar lookups is 2.1v, 4.29v and 5v when selecting each sensor type. It all works out and follows the MAP sensor calcs...

1Bar
MAP(kPa) = (0.369 x N) + 10.354

2Bar
MAP(kPa) = (0.781 x N) + 8

3Bar
MAP(kPa) = (1.22 x N) + 2.2

Where N = (Volts/5) * 255