motor hiccup (sounds almost liek a miss)
 

my motor has a hicup at an idle at random times, sounds almost like a miss but is to random to be a miss, also sometimes the bogs between 2500,3000 rpm any ideas what could be the malfunction

im sure some one exerienced here could help you with this problem but you need to give more information...

do you have any headers or k&N

check your fuses check your vacuum CHECK FOR ERROR CODES

there is links every where for the supra only repair manual
fine error codes and follow the steps

found it never in a million years would i guess this my valve cover has the tiniest leak and the wiring harness was sitting right ontop of where the oil comes out and the oil soaked the wiring harness and followed it all the way to ecu and soak all the plugs on the ecu how crazy is that

wow dude that sucks....
so do you now need a new ecu??
i suggest opening up the harnnes and cleaning the oil off.
you can buy the special wrap stuff from an auto parts store...

No the ecu is still good cleaned the wiring harness plugs and the ecu and now its fine had to drill two holes in the cowl to keep the wirring harnes above the valve cover but its all good now