Good point Calum. I have been aware of the problem with loose terminals and those buggers in plugs without fixed terminals definitely do loosen. In my case this isn’t the problem because my current plugs have fixed terminals.

Stephen I’m personally not aware of plug wires that fit directly to the threads. I’ll definitely report what happens.

I’m going to go through my entire ignition system. I just was reading one of our old threads about spark plugs back in 2016. I reported back then how my engine smoothness was transformed by installing the NGK DCPR7EIX iridium plugs which at the time made me wonder if my coil was bad. This plug requires less voltage to make a good spark and would improve the situation if the coil is subpar. I don’t think the improvement was due to just installing a new plug because I tried other brands of new standard plugs without effect. However after awhile still seemed to experience similar symptoms so went back to standard plugs. I’m going to replace my coil as well and just ordered one. I’ve been reading about heat and coils. Not a good mix. Anybody have any thoughts about the placement of the coil right next to the very hot oil reservoir.

I believe my alternator and rectifier are functioning ok because my voltmeter reads a steady slightly greater than 14 volts under load. Will check to make sure all the electrical connections are intact.

Is there any other ignition component between the ECU and the coil?

Regarding the fuel system, I ordered a new fuel filter and will replace that. I don’t think this has been the problem though because these issues have been present from new. I’m going to leave the fuel pump alone for now pending results from these other steps. If working with the ignition side of things doesn’t help will then start looking more carefully at the fuel supply side including pump and injectors. I’m trying to do the simpler things I can do first and will reach out to professional assistance again if needed. I assume the ECU monitors all the engine sensors and reports a malfunction of any of these.

Really appreciate everyone’s input. Like I’ve said before the support we get from this forum is invaluable and greatly adds to M3W ownership.

Last edited by Sportster; 17/02/22 04:22 PM.
2015 M3W, Morgan Aero Racing Stage 1, Garage 56 Stage 2, sport black, saddle tan, jeweled SS dash.