dr_latino999

iTrader: (12)

Installed Zeitronix ZT-2 with their supplied MAP sensor for boost readings, and I'm getting some odd feedback. Maybe I haven't had my morning coffee, but tell me if this is normal:

Exposed to atmosphere, engine off, reads -10.8/-11psi of vacuum. Connected to reference vacuum line, reads -16 and lower psi at idle....I'm not going to believe that for a minute with GSC S2s







Could the wiring be incorrect?

Zeitronix Pin 1 Red goes ECU Pin 25 (12V Switched Power Supply, or any other 12V source)
Zeitronix Pin 3 Green goes ECU Pin 58 ( Tach Signal)
Zeitronix Pin 7 Black goes ECU Pin 26 (Chassis Ground, or any other ground)
Zeitronix Pin 11 Brown goes ECU Pin 92 (Sensor ground)
Zeitronix Pin 10 Grey goes ECU Pin 84 (Throttle Position Sensor Signal)

Boost Sensor

Boost Sensor Green cable goes Zeitronix Pin 4 Orange
Boost Sensor Red cable goes Zeitronix Pin 6 Yellow
Boost Sensor Black cable goes Zeitronix Pin 11 Brown

Raptord

iTrader: (10)

Did you scale it for the correct MAP sensor with the ZT software?

dr_latino999

iTrader: (12)

Nope, just plug and played, didn't see a blurb in the official instructions on doing that. Are you thinking it's scaled for the 5 bar out of the box as opposed to the 3.5?

Raptord

iTrader: (10)

I don't know, but it can't hurt to check to at least rule that out.

dr_latino999

iTrader: (12)

According to Zeitronix -

50 psi sensor: pressure = 12.5 * voltage - 20.95
75 psi sensor: pressure = 18.75 * voltage - 24.075

So if the ZT-2 controller is software set for the 5 bar, and if the circuit has 0.7V, I'd end up with the 3.5 bar MAP generating a signal equivalent to -10.95psi. I won't have my serial-usb adapter till Wednesday so I'm going to have to live with it until then and I can dig around the software.

dr_latino999

iTrader: (12)

Did some further testing yesterday with a friends ZT-2 box.

1 - I have the 2009 model vs the 2010+. This is what I get for not learning the difference ahead of time, and then not asking about it before buying it on the F/S Forum.

2 - When the 2010 model is plugged in, I can manipulate and calibrate the boost sensor to read 0psi at atmospheric, no problems at. With the 2009 box, it detects the boost sensor (it's getting the reading) but it isn't allowing me to calibrate it at all.

I'm going to shoot Zeitronix an email and see what the difference is. I'm tracking the 3.5 bar map sensor is supported by both models.

Raptord

iTrader: (10)

I have a 2009 model as well and IIRC the 3.5bar MAP sensor, works just fine for me.

dr_latino999

iTrader: (12)

It turns out I may have a pre-pre-2009 model -

Going to see if they can do the upgrade on this box, what the turn around will be, and if it will fix this problem. Details