Strutto - Thanks for the PM...
Here Goes....
It appears that the automatic's wiring in nissans do in fact read the RPM signal from somwhere (haven't investigated where yet).... This signal going through some extra wiring to the auto control unit causes some minor electrical interference. This interference is picked up when trying to tune the e-manage. I assume this is due to the e-manage being more sensitive than the factory ECU. I am also assuming this is the same reason that neither FC's or FCONV's are available for automatics (maybe link's aren't either)??
My problem so far is that I have only tried tuning e-manage (not fitted by me) on one automatic car which was severly accident damaged by the owner a week after my initial attempt. The car has since been repaired but I think the owner is no longer looking for the extra power.
I have had several suggestions on how to rectify this problem, ranging from resistors inline with certain wires going to the e-manage which have RPM based signals (CAS, IGN, INJ), and to also try and run shielded wiring for the emanage.
All the other ECU's I've seen run shielded wiring right up to the ECU which the e-manage doesn't, so this would be the first place I would look.
Skylineakt - As far as fuel tuning goes the E-Manage is excellent, and a much better option than an SAFC or similar.... Perhaps you would be interested in a discounted supply/install and allow us to research this problem further on your car? Worst case scenario is that you have more power with a perfectly tuned fuel curve... Best case scenario is that we will discover how to maximise the potential of the e-manage for all our skyline brethren the world over???
Doc.