yes.....
ok, update.
went to the u pull yard today, well....2 of them. first yard was the more popular yard, every LS400 was stripped of its ecus, and most frequently worn parts (seat memory module, lcd a/c panel, fuel pump control module etc.) no tps's, afm's, IACV's, or any of the likes of the sensors were chasing after.
so i go to the second yard as theyre driving in an exact 94 LS400 just like mine....SCORE!!!! i got to examine the car, running, revving, etc. no CEL, just the usual bad trans.
so i snag the ECU, TPS, AFM, ABS/TRAC module, working cluster, and a few other items......basically rapped the car while it was still warm, lol. (no necro pun intended)
get home, throw in the ecu, my original ecu was an 89661-50141. ive read that the 50142, such as i had purchased was the better of the ecu's, and had most of the previous issues resolved, and also was less prone to failure.
on warm up of first start, car was amazing!! no issues, free revving to redline, bouncing off the rev limiter, no smoke, not rich, awesome!! problem solved!!
well.....
after 3 or 4 shut offs and start ups, the car still behaved well. so i go to run "the loop" we call it, (i reside on a semi-circle, off of a state highway.) car accelerated perfectly! hit second gear, 3000 rpms, and pop, pop, pop, it starts choking.....CEL, and TRAC OFF light, but only when the problem occured.
lights went off, i dropped to 25% throttle, and the car drove fine.
pull codes!!! yay!! an ecu that will give me codes. 41 and 47, which i did play with a bit when previously trouble shooting. adjusted per specs, cleared code, restart.....same issue. im finding that its cutting at exactly 3000 rpms.
continuity tested all wires between the trac TPS, and main TPS, both back to the ECU. all good. 5 volts on all 3 wires for the AFM coming from the ecu to the AFM. same with the TPS's. 5 volts where it should be and everything ohming out in spec.
replaced the trac/abs module, no difference, again, jumper fp and b+ in the diag connector to double check for proper fuel pressure, not it........
so i broke out an injector node and timing light to see whats getting pulled at 3k rpm. the injectors are going offline at over 50% throttle.
25% throttle, i can take it to redline, go to over 50% throttle and it falls on its face. reset everything, unplug battery, its fine. so this tells me the ecu is seeing something on the engine its not liking, and its pulling the fuel when it sees it and reporting it as a TPS issue, yet ive already been over that a few times.
so, basically 41 is the only code im getting now.