Hi, yeah the Fc voltage follows the mfd signal,
the lights come on sometimes, but mainly when i turn the aircon on, after a few minutes or so.
The guy i bought the car off had the same problem so he replaced the TPS but has not fixed the problem.
The gtr has -5 turbos, 600cc injectors, fc boost controller, high flow fuel pump, few other mods but nothing more engine wise.
The TPS i assume has been stuffed for a while. Ive checked almost everything to do with this issue and think its possibly out of range and once the aircon comes on the the engine changes its base idle it sets it off.
i have not done a reset of the fc yet. i have to save the tune first and re-do the idle learn sequence.