hi. a couple of questions to ask

1. will a ef/el/au isc fit a ea-ed mpfi throttle body. ifso how do they fit

2. will a ef/el/au isc work on a ea-ed mpfi throttle body. ifso how do you make it work

3. will a ef/el/au throttle body fit/work on a ea-ed mpfi inlet manifold. ifso are they better that the smaler ea-ed throttle bodys

1. yes they fit.. unbolt one and bolt the other on..

2. yes it will work you need to cut and solder the ef or au plug onto your loom.

3. it will bolt on but the throttle cables are different so without a custom or modified cable it wont really work.
and the throttle bodies are the same size from ea to au (64mm) so there is no gain to be had..

with the ef/el/au isc is the idle smoother than a ea-ed in a ea-ed which throttle bodys best to be better than a ea-ed one

other than the way the throttle cable mounts and the casting is slightly different,
the throttle bodys are the same..
and the isc operates the same aswell..

its not going to idle smoother,go better or be any different on fuel..
by using an el isc or throttle body..
meaning they are no better!

is the wiring on the el/au plug the same as a ea-ed plug for the isc how do you match the wires and how do you tell what the new valves are like