Map Calibration off

[T1BRAY]

Looked everywhere so missing something I’m sure .

I’m .5 to 60.04 using the wizard . If there is a 400kpa internal sensor it would be converted to psi a at 58.02 correct ? Also I need Calibration voltage wizard shows 0-5v should it not be .5 to 4.5v . or is there a procedure to calculate . Learning ,Please help me understand also could not find any real information . Help only talked about external sensor .
Is there a repository for sensor data ?

Thank you !!

“

Using the internal Map Sensor on the black v3.059.

[ArvidW]

On my EMU black the MAP calibration is also off a bit. It reads 5kPa higher than the local weather station when the bike is off.

The BLACK V3.059 software has an option to correct this offset. See green arrow below:

To answer your 0-5v question. The 4bar MAP sensor probably reads 0.2bar @0.2volt, and 4bar@4.8volt. If you extrapolate that you get 3kPa @ 0V and 418kPa @5volt. Very similar to the original values in the ECU

MAP-sensor-manual.pdf (The BLACK probably has a very similar sensor as the one in this pdf)

Just put back the original MAP calibration data, and correct it via the MAP offset shown above.

[T1BRAY]

Thank you for the reply and yes I understand the offset relation .

Very curious to know if the conversion Metric to Imperial is correct ?

If you select the internal Map sensor does it ignore the calibration table in version 3 ?

If you use the wizard I would think it would use 58.02 not 60.04 when selecting imperial vs Metric is there a way to tell ?

Reason for all the questions the way I understand it the Map sensor has impact to the Pulse With ,VE table and estimated air flow . Currently have issues with LOW Air flow estimated and Air /Fuel mix is off.

All reply’s are welcome also see if someone from ecumaster can chime in .

[Jadzwin_ECUMASTER]

Airflow estimation bases on MAP, lambda target and VE.

[T1BRAY]

Can you tell me sir if I select the internal map sensor I don’t need to calibrate even if I select imperial over metric ? Trying to figure out why I have low estimated air flow . Can provide log and emu . Thanks

[Jadzwin_ECUMASTER]

You dont need to calibrate if you select internal MAP.

Imperial units are calculated in Windows software based on metric units that are used in the device firmware.

[T1BRAY]

Jadzwin , Thank you for the support . Happy Thanks Giving .

Please see below sir .Can you check this out ?

Subject: v3.059 Internal MAP Cranking Over-Read – 2 Data Points – 1JZ-GTE

ECU applies Toyota 1-bar scaling during cranking despite Internal 400 kPa selected.

ECU: EMU Black v3.059

Engine: 1JZ-GTE non-VVTi, 850 cc injectors, no IACV, 90 mm TB

KOEO: Map 14.6 psi a (correct)

Idle: ~6.5 psi a (correct)

CRANKING BUG (Source = Internal 400 kPa):

Log Point 1:

RPM: 371

MAP Voltage: 1.02 V → expected ~5.8 psi a

ECU MAP: 12.47 psi a

Airflow: 10.40 g/sec

PW: 16.71 ms

VE: 133.20 %

Log Point 2:

RPM: 147

MAP Voltage: 1.10 V → expected ~6.2 psi a

ECU MAP: 13.63 psi a

Airflow: 4.90 g/sec

PW: 18.15 ms

VE: 109.00 %

ECU applies Toyota 1-bar scaling during cranking despite Internal 400 kPa selected.

Attached Log for review sir Thank you

20251128_2017.emublog3 (3.5 MB)

[Jadzwin_ECUMASTER]

I really dont ubderstand what do yoy mean and where is the problem.

If you want to use internal MAP just connect the pressure line to manifold and select use ibternal map.

Typicial MAP pressure during cranking is about 80kPa.

[T1BRAY]

Thank you for quick reply .

The I have selected the Internal map which is 4bar . The sensor during the cranking is looks off . the key on engine off is 14.6 witch is correct in Ohio where I’m at but when cranking the values are associated to the Toyota oem 1bar reference scale during cranking . This impacts my PW Value and estimated air the ecu calculates . The data above looks like that is happening . Getting to much calculated PW and Air . I could be wrong but the data suggest otherwise . Sorry new to all this . Thank you for looking .please let me know either way sir .