MSPNP2- Low MAP kpa reading vs baro kpa

[Bmrbob]

Hey guys, have been playing with my MSPNP2 for over a week now and am having a hard time. My car will on start for a few seconds then die. Will run (roughly) with my map line disconnected, but once I attach it then dead. Cant datalog because it wont run. AFR goes lean while dying. Timing is correct, tps settings off, wo2 calibrated, ait temp working, and correct map sensor chosen (MPXH6400), baro correction 0. My MAP kpa is at 70, while baro is around 100kpa. Is there anything you guys could think causing this low map kpa reading? Have tried both 3.4.2 and 3.3.3 flash's. Trying to run a 9093 3.3.1 miata base map. Stock motor. Using newest version of TS. Any way non matching signature message while loading tune can cause this? Any help is appreciated. Have exhausted all my possibilities and countless hours online reading. Thanks in advance.

2017-09-12_14.25.34.msq

[Bmrbob]

I have read thread after thread about people not having their map sensors/setting "calibrated" correctly, then advised to do so, and all problem are magically fixed. This is not my case! What else can cause me to have 70kpa with car off? Baro is around 97. Oddly, cars idles, somewhat with vac line off then. Have done all "calibrations" over and over and over. Can the sensor be bad? It changed values while sucking/blowing on it. Its a MSPNP2. And from what I read it can not be altered with inc files? Im struggling here, bad!

[Bmrbob]

Here are some datalog with both map line disconnected and connected. Reads 77kpa with car off.

[Matt Cramer]

Please measure the voltage on the MAP selection jumper with the key on and engine off - let me know what you find. This will help us tell if it's a software or hardware issue here.

[Bmrbob]

Please measure the voltage on the MAP selection jumper with the key on and engine off - let me know what you find. This will help us tell if it's a software or hardware issue here.

Jumper reads .03v

[whittlebeast]

Assuming you do not live at about 8000 ft altitude, you MAP needs to be calibrated in Tuner Studio.

Andy

[Bmrbob]

Assuming you do not live at about 8000 ft altitude, you MAP needs to be calibrated in Tuner Studio.

Andy

Would you like to guide me on how to do this other than under Tools->Calibrate MAP/Baro->and choose my sensor. Because I have the corrected one chosen. 10 times over, and it is still reading 77kpa

[Bmrbob]

Im about 700ft above sea level btw

[Matt Cramer]

Please measure the voltage on the MAP selection jumper with the key on and engine off - let me know what you find. This will help us tell if it's a software or hardware issue here.

Jumper reads .03v

Where exactly did you measure - can you post a picture of which pin?

[Bmrbob]

The 2 pins labeled for INT

[rickb794]

Is there a jumper missing on the MAP select header?

[Bmrbob]

Is there a jumper missing on the MAP select header?

No, just took it off for picture purpose and to measure.

[hybrid]

I would guess Matt meant to measure from one of those pins to GND, assuming the pin carries the 5V signal.

[Matt Cramer]

I would guess Matt meant to measure from one of those pins to GND, assuming the pin carries the 5V signal.

Correct.

[Bmrbob]

It reads 4.01v with ignition on. From jumper pin to ground on sensor.

[Matt Cramer]

That's unexpectedly high. What pin did you use for ground?

[Bmrbob]

That's unexpectedly high. What pin did you use for ground?

I used pin 3 on the sensor itself. Found the pinout for the mpxh6400 sensor online. Should I try another ground? Or Vref voltage?

[Matt Cramer]

That is the right pin - the package is installed so that the upper left hand corner is pin 4. Pin 3 connects to the left pad of C4; that pad may be easier to get a good read off of.

[Njdhartmann]

Was this ever resolved? This is my exact issue and exact values