I have the MSpnp for the 93 miata and im in the process of wiring Water Injection and i was wondering what the easiest way to get a MAP signal to the water injection controller. Please help !

 

People have reported good success using copper wire to connect the MAP sensor to the WI controller.

Seriously, are you asking how to use the MS's internal MAP sensor to control your WI system? Don't.

First, it's probably the wrong scale. The MS uses a 2.5 bar sensor, whereas most WI controllers I'm familiar with want either a 2 bar or 3 bar sensor.

Second, there's too much risk of introducing noise or offset into the MS's MAP signal. That signal is way too critical to be hanging long wires off of and connecting to foreign devices.

Just buy a GM 2-bar MAP sensor and tee it into the vacuum line feeding the MS. They're cheap.

 

no im not trying to controll it from the megasquirt. im just trying to find somethin i can get a signal from and save 75$ and not buying the one from Devils Own site.