×

Sale ends todayGet 30% off any course (excluding packages)

Ends in --- --- ---

VR sensor Piggy back setup road blocks

Practical Motorsport Wiring - Club Level

Forum Posts

Courses

Blog

Tech Articles

Discussion and questions related to the course Practical Motorsport Wiring - Club Level

= Resolved threads

Author
916 Views

Hello. I wired EMU black in a piggy back setup on a ford expedition 5.4L 1998 Twin turbo. I spliced into the positive signal wire of the VR sensors (Crankshaft and camshaft sensors) and connected each to EMU black.

I disconnected the fuel pump and hit the starter to check for trigger signal on EMU scope and found none.

When I disconnected the stock ECU connector I got a CRANK and CAM signal on the scope when I hit the starter which was weird since both signals were in the Primary trigger tab in the scope and I was confused on how the sensors were giving out a signal if their negative side was floating and not connected to any sensor ground.

Also I need to figure out why I can't get the sensors to work on EMU black with the stock ECU

Your help would be appreciated greatly as I've been stuck now for over a week

The VR sensor will still give a signal with the ground floating because the sensor generates its own AC voltage. Is there a software selectable pull up resistor turn on, because that would cause issues? Have you tried talking with ECU Master? They may have specific requirements for piggybacking sensors.

We usually reply within 12hrs (often sooner)

Need Help?

Need help choosing a course?

Experiencing website difficulties?

Or need to contact us for any other reason?