At the beginning of this marathon thread I thought the problem would be a failed main pump. OP reported having a healthy flow of fuel at the injector rail, the pressure of which was unknown - maybe not enough pressure to produce a combustible air/fuel mixture. I thought maybe the fuel was flowing due to a working LOW pressure pump and that the MAIN pump might not be working as he was able to get it to briefly run on starter fluid.

Then my thinking shifted as the OP reported that he had found a dead low pressure pump. So if that’s the case then it must be the main pump that is pushing fuel to the rail. Can we assume that if the main pump is the one doing all the work that it must be working at proper (high) pressure? Can a high pressure pump “partially fail” in a way that it still pumps but at a reduced pressure? I don’t think I’ve ever heard of that.

So if we assume for the moment that the main pump is working OK then why are the injectors not injecting adequate fuel? It can’t be because of a failed CPS as the car has spark. So are the injectors opening?

On the 240s are the injectors constantly fed a + electrical signal and the computer controls a grounding path of varying duration? Just thought I’d throw out some more food for thought.

And the saga continues……