Hello,
I would like to report a problem that prevents me from using the VE V2 table for V3, or even adjusting this table, due to an incorrect MAP reading.
Although the sensor has been calibrated, the MAP reading in V3 is higher than the actual pressure capacity of the compressor.
(This is the PnP system for the Lotus Elise with a 2ZR engine.)
I have not been able to find a way to log the MAP voltage in V2.
I have found a way to log the MAP in V3.
The scatter plot seems to correspond to the characteristics of the sensor.
However, the MAP is much too high.
Is there a bug (?) or a problem with this function?
last dance before v3 log new.emublog (1.3 MB)
last dance before v3 new.emub (146.9 KB)
last dance before v3_tuned.emub (146.9 KB)
first dance log v3 - 20250709_2014.emublog3 (1.0 MB)
first dance v3.emub3 (73.4 KB)
I’d like to update my thoughts.
The equivalence between tension and pressure works perfectly.
I think the problem lies more with the voltage reading.
it seems that the voltage reading does not correspond to the actual voltage.
the maximum compressor pressure is 10 psi, i.e. a maximum of 170 kpa.
The MAP should never read a pressure of 180 kpa.
@Jadzwin_ECUMASTER , sorry to bother you but would you like to have a look at this problem?
Hi!
I looked to your configuration and it seems good.
Also the MAP calculations looks good.
It is virtually impossible that the analog input is read wrong as it is read as the other ones.
I’m actually on vacation and I’m not able to run it on the simulator.
But you can make simple check with the multimeter and measer the real voltage when the eninge is turned off. It should show baro pressure and the voltage should be the same as EMU shows.
You MAP can show more pressure in the situation when your exhoust is restricted (eg. melted CAT).
1 Like
Hi Jadz,
Thank you for your reply.
I’ve revert do V2.175 and everything is fine. MAP goes as expected.
I will check tension.
Enjoy your vacation!
