Hi Mr. DeWolfe,

As usual I'm checking in too late to be of much help and Randy will have this puzzle left at home to distract him as he ventures out on one of his most interesting road trips. Actually, I have no LH2.2 experience; all my 240s bracket those years perfectly, so I tend to be mute on this topic and let the experienced folks reply.

In this case I do know how LH2.2 does cold start. It works just like it does in LH2.0. Based on temperature clues from the ECT and an ECU input on the starter solenoid terminal (key position III) the four service injectors deliver a longer squirt during cold starts. No need for the 5th injector.

This probably wasn't ideal for the replacement technology in LH2.4, as Volvo went back to using the dedicated cold start valve for a few years beginning in 89 through 92, lifting it again in favor of doing it under program control.

Reading what Randy has tried, knowing Randy's experience and skills, I'm convinced he is just doing all possible to avoid the inevitable look under the cam cover and head. The fuel system has been eliminated by the ether test in combination with his verification the injectors do not dribble (closed), and only a gross blockage of air could prevent it running on ether with timed spark and sufficient compression.

Maybe one last triage check for breathing (airway) during crank - either a gauge if you know what to expect, or a palm across the throttle body intake, and over the tailpipe, a look at heartbeat, or the firing order (you don't know who put those plug wires on last), and one final compression test and valve timing verification before looking for valve stems with no clearance under the cam, or a channel between two cylinders.
--
Art Benstein near Baltimore

Time flies like an arrow. Fruit flies like a banana.