MSPNP3 - initial install questions

[rockstar b Third Gear Find all posts View Profile Close rockstar b]

I'm still waiting for my VTPS to get here. I am getting no input from my stock 1.6 TPS - is this correct?

I've also lost my AC. The ecu will idle up when the button is pressed, but the compressor will not engage, thoughts?

[rockstar b Third Gear Find all posts View Profile Close rockstar b]

the condenser fan is not coming on, either

[iscariot Probably Should Be Working Find all posts View Profile Close iscariot]

TPS is switch type, so you should be seeing a change at full throttle. But you *really* need a vtps to tune accel enrichment nicely.

I don't know the mspnp that well - but megasquirt I'm pretty handy. which initial msq did you use?

[miatastuff Lives On MX5Atlanta.com Find all posts View Profile Close miatastuff]

1.6 TPS is idle, on and WOT if I recall. Auto is variable. I have one if needed.

[rockstar b Third Gear Find all posts View Profile Close rockstar b]

A VTPS is coming with the turbo kit that I ordered. I should be seeing either 0% or 100%, but I'm only getting 0. I checked the resistance at the sensor and it's all good.

No AC sucks, too. I plugged the stock ECU back in and it works, so I've done something wrong or the MS is messing something up.

I'm on MS3-Pro.

[iscariot Probably Should Be Working Find all posts View Profile Close iscariot]

did you make your own harness?

[rockstar b Third Gear Find all posts View Profile Close rockstar b]

No, it's plug-and-play

[wildfire0310 Moderator Find all posts View Profile Close wildfire0310]

This is a total assumption thing but

• Lack of input from the TPS is most likely a setting/Wiring thing. I am willing to bet that the system is defaulted to VTPS but since you lack one. It's either not getting a signal type it wants or it's looking for it on a pin of your ECU that has no wiring.
• Same with AC, most likely a setting issues. I don't think it would be related to the lack of TPS but wouldn't shock me.

Sadly I have no knowledge of the MS3Pro, so I can only talk in theory. Have you reached out to the boys at DIY?

[rockstar b Third Gear Find all posts View Profile Close rockstar b]

Yeah, if it is somehow disabling AC under a throttle setting like zero or WOT, it may not be sending a signal for the compressor clutch to engage. I'm hoping it'll fix itself when the VTPS is installed.

[iscariot Probably Should Be Working Find all posts View Profile Close iscariot]

So what is your TPS reading with the MS in the car?

[rockstar b Third Gear Find all posts View Profile Close rockstar b]

It doesn't read

[rockstar b Third Gear Find all posts View Profile Close rockstar b]

I just re-read the install instructions and saw that there is probably a jumper on the main board enabling VTPS. I'll check it tomorrow and pull it to see if it fixes it.

[rockstar b Third Gear Find all posts View Profile Close rockstar b]

Well, that jumper was not present so I'm at a loss again

[iscariot Probably Should Be Working Find all posts View Profile Close iscariot]

In tunerstudio, go to tools / calibrate TPS. It'll bring up a bar and have you set the closed and open position. With the VTPS you can watch the bar move - but I would expect it to go 0-100 real quick with the switch tps.

There's also the throttle position gauge in the main TS screen.

[rockstar b Third Gear Find all posts View Profile Close rockstar b]

I've tried that. I'm getting nothing on that screen from the throttle.