I know your just trying to flog your tacho relays : p
the ecu has an output for running fuel pumps, what i need is a relay that will trigger at
2v. ive got one that will trigger from 3v, so it only picks up the high speed signal.
I know it can be worked out with a transistor to bump up the fp signal, but im not to good with small soldering. (i ususaly work with 240/415 stuff)
I bet an auto sparky could knock up a simple setup that would work for conversions and be used to replace the fuel pump ecu on standard cars (which have a habit of dying), hint hint.