Wiring map sensor into external output

[ferocity02]

Did you wire it to the a/c pressure sensor or straight to the external input.

[joecar]

Where is it wired to...?

What kPa range does 0-5V represent (is it 0-200kPa)...?

[badls1]

I used the a/c 5v refrence and the a/c signal. I then made a pid that displays the a/c signal. it changes when I put pressure on it but its not right. Its a 3 bar map sensor

[joecar]

Can you confirm that the 3-bar sensor maps 0-300kPa to 0-5V...

is this is the case then your calc pid would multiply the AC pressure voltage pid by 60 to get kPa

( can you measure it as you apply vacuum and pressure to it...?)

(remembering that going under 100kP is vacuum, and going above 100kP is pressure).

[badls1]

I just emailed the seller about it. I would assume that it does. So I just changed my pid to multiple the AC pressure by 60. when I turn the car on it should read around 100 kpa and if I put 10 psi to it, it should be around 170 correct?

[badls1]

at 0 it reads 94.1kpa, at 13.5~180, 16.5~202, 17.5~212. This is testing vs my mechanical boost gauge. so it seems to just be off by ~7 kpa the whole time.

[joecar]

If you can get a few V:kPa pairs of values, we can write a calc pid fir it.