The air flow plate hanging up on the air horn was acting a lot like leaky injectors. The previous owner had installed new injectors, which I pulled and bench tested and cleaned. Didn't really help. It also had a new fuel pressure regulator which was replaced b/c of a mis-diagnosed failed accumulator. I replaced the fuel distributor, idle air valve, and CIS ecu as well as the MAS unit with my spares, nothing helped. I checked the compression, which wasn't stellar on a 230k engine but not bad enough to cause real problems. I also checked the cam timing which looked fine. Went through the ignition system too, alas no avail. I did find a piece of a paper shop towel in one of the injector nozzle holders. I was hopeful that the other holders would have trash too but after pulling all and checking only the one was clogged with debris. I was at my wits end and was getting close to just accepting my poor starting fate. Needless to say once fixed I was walking around the shop beaming with pride for the rest of the day.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff