[ddmcse]

if you are going to modify a turbo'd supra

put an air/fuel meter on it .

air/fuel mix is extremely important for a turbo's supra

there is a reason why these cars run a little rich ,

it's to keep idiots from wrecking the engine once they start to modify things like they know what they are doing

the oxygen sensor could cause it to be a little rich but when i swapped mine out it didn't help.
it was my vsv valves . i tried all kinds of things checked everything , you wonder how a turbo forcing air into the engine could make it rich in the first place .
i replaced the start injector too .

a simple continuity check on the vsv showed it was out of spec . replacing both of them gave me instant gratification with a nice and balanced air/fuel meter ..

you have to have an air/fuel meter if you are going to start messing with a turbo supra .
you need a baseline