and I had trouble again today - it wouldn't start, a spark issue. I tried jump starting (in case the computer was shutting down because too low of voltage), no. a bit of fuel in the tbi, no. finally someone said something about timing and I realized that I could bypass the computer control of the spark by unplugging the wire you unplug for setting the timing. then it started. plugged it back in, it started and ran fine.
so I have another gremlin to chase.... the problem with buying used parts is sometimes someone took them off because they didn't work... there is a timing issue, I had one backfire when I really loaded and lugged the motor - so I dunno, for that wire-disconnect trick to work, there'd have to be something amiss with the computer (but it doesn't throw a fault code). So I dunno, probably the best thing would be to get another computer an reflash a chip for it.
Also the heater core is leaking - which actually may be a good thing since the FJ40 replacement is expensive and the heat output is nothing to write home about.... in short, build a better mousetrap