2-step with EMU

**blindmist** · 10-18-2010, 06:09 AM

I cannot even get it to see the Vehicle Speed Sensor. It just shows 0 even when I am moving.

**terrets** · 10-18-2010, 07:38 AM

Oh thats odd....I wonder if you have to wire something a little differently? Or maybe you do need to use one of the option ports or switch port...Im not sure ha.

**blindmist** · 10-18-2010, 08:53 AM

Figured it out. My Boomslang Stage 2.5 doesn't have the 3rd connector. The one used for Injector Subtract in Stage 3. BUT on that 3rd connector, there is the IAT, Water Temp, Crank Angle, Cam Angle, and Vehicle Speed.

Here is the point I am at. The 91-93 don't have crank angle sensors correct? Yet, the pinout states that on a 91-93 DOHC, Crank angle is pin 69 and the TDC is pin 68. So my question is, do I hook the EMU crank angle to pin 69 and the Cam angle to the "TDC Sensor" pin 68?

**terrets** · 10-18-2010, 09:27 AM

They do have crank angle sensors....Just in a different position, on the intake side of the motor.

If the EMU cam angle sensor only needs to know where TDC is and the volts are the same, I dont see why not.

Check this out: http://www.3si.org/forum/f103/ultima...ep#post4479821

Just for reference

**blindmist** · 10-18-2010, 10:51 AM

I figured it out. The Crank angle and Cam angle are in one sensor. I just thought it was Cam only. I wired the Crank to the Crank and the TDC to the Cam. Works perfect, also got my vehicle speed, intake temp, and water temp wired in now too. I sure am glad I didn't get rid of the universal harness. I was even able to run the wires down the boomslang loom, it all looks almost like the boomslang except for the electrical tape.

Also, you have to understand, the crank angle sensor goes 2x as fast as the cam. Or the cam goes 1/2 the speed of the crank. Wiring them together wouldn't work.

See pin 40 and 41 there on the right (EMU side). That is your vehicle speed. See how someone can miss wiring that in? Even that diagram doesn't have it wired in.

I think I am going to revise these diagrams as they don't have the IAT, Water temp, Speed sensor, Crank, or Cam sensors drawn in there.

As you can see, this doesn't have anything on the ECU pins 68, 69, 66, 63, 52