Just a quick up-date
Installed the new ISC sunday, idle was a little high, followed Erics switch off/on restart and now idle is steady at 750-800rpm in park.

The new ISC is a genuine Mitsu, well it has the 3 diamonds moulded into the case along with the relevant part no.

Coil values are all ~40ohm.

This is the second time around for this, first time was about 6 years back & I got a recon unit for more $'s than this new one <img src="/forums/images/graemlins/confused.gif" alt="" /> still both were/are significantly cheaper than Mitsu UK which runs @ approx $1000 (inc tax)

Thanks again to all who offered help <img src="/forums/images/graemlins/cheers.gif" alt="" />

SteveN