as title says does anyone know if there sensor needs the pullup? if it does not does it do any harm having the pullup installed? cheers

 

also I have a DIY auto tune loom. the ms3 loom already has the shielded wire installed for trigger input. Am I ok to use this or am I better to wire in another shielded into the ms3x trigger input. is there a benefit on using ms3x over ms3 for trigger?

 

i think that you dont need the pullup with the ffe sensor, use the ms3 loom thats your crank sensor input to wire the sensor, the ms3x its for a cam input.

 

If the sensor is three wire and has it's own supply via 5V or 12V, you don't need the pullup. If it is a two wire sensor, you do.

 

if it was 2 wire then it would be VR correct.i have 3 wire hall sensor it's just I read some have built in pull up and some need the jumper set up with pull up on proto area. . I built my ecu a while ago and the manuals have changed and through me off abit. I have made it with the pullup. so I will just de-solder it if it's not need with the FFE Hall sensor.

 

There are 2 wire hall sensors that require a pullup to supply power.

Generally 3 wire hall sensors do not require a pullup as they have a separate power wire.

VR sensors are 2 wire (at least I've never seen a 3 wire and can't imagine why someone would center tap a VR sensor coil).

Maybe best to just ask FFE what version you have.

 

I actually contacted FFE earlier this year about the same thing, and he said that the Hall Effect sensor has a built in pull-up resistor, so you don't need to add one. This is obviously assuming you have the 3-wire Hall Effect sensor and not the mag.

 

awesome I knew I had bought hall. Just unsure if it had the pullup in the sensor or not.
thanks I was going to contact ffe but thought someone else would have done a install before me and would be here for everyone else to see. it wasn't mentioned on there site or with any of the install documents.