dneal92

Im having an erratic idle, miss fire, running rich runs great wot and still has alot of power but while driving with no throttle fluctuations just cruising it losses power until i give more throttle.
Ive replaced coils plug wires plugs caps rotors cleaned throttle body crankshaft position sensor o2 sensors maf tps iacv and coolant temp sensor im lost dude i got an ecu from the junk yard but no change it could be bad as well im pretty much out of options

dicer

So since you have a 1990 LS400, the maf is an airmeter, if you tried cleaning it then you likely messed it up.

dneal92

Ive tried to different afm's with no change. Last night i was poking around with it and did a resistance check on the cam sensors they came out in spec but when its running i can unplug both and it makes no change is that normal