88jdmfc

I have an 88 jspec Tll motor and I'm wiring in the megasquirt ms3 into it and I've been resorting to aaron cakes site which has been a lot of help for me but I've only been confused on a couple of things and that's wiring in the CAS and also exactly which wires on the leading and trailing coils i have to wire in I've been looking at pictures and reading and I still can figure it out any help would be appreciated...thanks

muythaibxr

On the CAS, the Ne+ wire should go to the mainboard tacho in pin, the NE- should go to sensor ground on the mainboard, The G+ wire should go to the ms3x's cam input, and the G- wire should go to sensor ground.

The spark outputs are:

Spark A: leading IGt
Spark B: Trailing IGt
Spark C: Trailing coil select.

88jdmfc

thanx just what i needed ill let u know if I have any more questions thanks alot

88jdmfc

im sorry which pin number are mainboard tacho the sensor ground on mainboard the cam input and the other sensor ground going to G-??

muythaibxr

Please see:

http://www.msextra.com/doc/index.html#ms3

and more specifically:

http://www.msextra.com/doc/ms3/hardware.html#wiring

Ken

88jdmfc

ohh ok thnx perfect sry electrical is not my strong point

88jdmfc

sry for some reason i thought i had the ms3 but i opened up the casing and saw i ordered the ms2 v3.57 and was wondering if i had to mod the ecu to run the stock cas??

muythaibxr

With MS2 to run the stock CAS you need to follow Aaron Cake's howto instructions. Basically you need a second trigger circuit to condition the signal from the second VR sensor in the CAS.

Ken