I just pulled the third Injection Labs AMM off my 740T and while it really never did completely fail, it had some peculiar hard to diagnose performance anomalies. I replaced it with an old Bosch unit.
Mileage was good but heavily loaded on long hills it developed an erratic or random miss. The idle was mildly erratic, really not bad. Also it would break up (miss) about 5500 and power was just slightly sluggish. Reminded me of an ignition miss. Probably most average drivers would not even notice the problem but just for grins I swapped back to the old Bosch and right away a much smoother idle, very sporty acceleration, no more breaking up at high revs. No mountains near Memphis but next trip to east TN I'll check out that out missing on the hills.
I also had one Injection Labs AMM completly fail going to full rich condition. My next new AMM will be a Bosch unit.
BTW I did take care of the pre-heat system, I twisted the aluminized tube so it picks up air just in front of the lower section of the radiator.
Anyway she's(more)fun to drive again!
Also has anyone ever added an air scoop/inlet to the side fender? It just seems so restricted. I was thinking the little grille on the rear left quarter of a 240 wagon might be adapted.