Ive got an EMS, Stock harness and boost pressure sensor are gone.
I don't want aftermarket gauges in the car. And I hate having dead gauges in the dash. So I want to get the gauge working.

Anybody ever work this out?

 

Which gauges are dead which you don't want dead?

 

Stock boost gauge

When I said "gauges" I meant i hate dead gauges in general. lol

 

Which EMS do you have? Normally you would need a boost sensor which has an output wire which would run to the gauge.

 

Really? I must have missed that.
Its a Ps1000.

Is the stocker 0-5v input?

 

S4 or S5? S4 has two voltage wires running to it, one 12 volt and the other 5 volts (Vref). The S5 does not have the 12 volt wire, just the Vref.

 

the stock boost gauge signal wire just tees and one end runs to the gauge, and the other to the ecu, so you could just put the stock boost sensor back, and run it to the gauge wire on the x-15 connector and it should work

 

What j9fd3s said. Use the stock boost sensor. You'll need to supply it with 5V from your EMS.

 

Thanks guys. Thats awesome info.

Unfortunately, my boost sensor is long gone. With the mentality of eliminating everything associated with the stock ecu and unneeded wiring.

I have an electronic boost gauge kicking around that I believe has a separate external sensor. I might play with that and see what it outputs. This way I can simplify it and keep it independent from the Haltech.

 

You can source a used one off of this site for a small amount of cash.

 

Well, that being the case, I believe someone else mentioned using a 0-5V output on the EMS to drive the stock gauge. My memory on the P1000 isn't as good as say the MS3, but I'd assume it provides a table that allows you to output a voltage based on a parameter you choose. Such as MAP.

If not, then a PWM output can be used. A little trickier as you must set up a voltage divider network at the PWM output to provide a slight load and the voltage to drive the gauge (provided by altering the PWM duty cycle with a capacitor in parallel).

 

hmm off the top i don't know if the haltech does it, although i can't say i've ever tried something like that.

the stock gauge is just a 0-5V gauge, so it is simple, at least.