i use a mallory mal 684 cdi ignition box, similar to the MSD, and yes it has a tach output that the ecu is conected too Jorgen,
you say about the filter, will this be removable? because when i go to ignition the cdi box will be coming out as will be going coil packs with wasted,
If the P259 is not dead what would cause the pump to stop working on the said channel?
or is there some thing else to check?
relays i use ripaults as we use at work, and the ones in the car have been on the efi system now since the VEMS install 2yr ago, and have been fault free, (thank god) (was using bosch as what came in the ready made loom when the relay died and pump stopped)
Im looking at changing the alternator to a higher ampage one,
so will look at getting a scope put on it, have had no said problems with alternator before, pity i never got a log when we first installed the ecu, before the pump went down, cos we could of seen if the spikes were there then too.