DUTH69R

Hey yall After reading a bunch of threads. I have a 92 sc400 while driving it shut off and would only give spurratic ignition pops. So far i've checked fuel pump runs and produces 45lbs min. checked timing and all related parts cam pos sens. 2 replaced crank pos sens replaced both ignitors checked ecu........ had atrace burnt inside------- replaced ecu now it will idle somewhat but will stumble and die if throttle is move much unplugged TPS and MAF and it will now idle smooth. plug in either TPS or MAF and it dies within a few seconds. i just installed a USED MAF and it made no difference. a bunch of people keep saying FCU but i am tired of chasing a ghost. i did take it to my local Lexus Dealer and was lied to by them . i have been building cars for 30 years and have just gotten stumped and fed up, their lil lie cost them about 90k in lost business that day alone. I now use a Dealer in Ga.. i need some help and insight Thanks