car was fixed! thanks everyone

 

it looks like it's running too rich and getting too much fuel. EGR might help a bit, to lean it out, good place to start. If not i would look into why's it's adding too much fuel.

 

thanks stick,
the car is mechanically stock, 95 sc400.

i shouldnt be able to adjust the timing cause the 1uz does it automatically isnt?
is running too rich the only thing that can cause this?

how about improper vacuum lines? or clogged/ malfunctioning EGR?

 

wow, you failed by alot. has your cat ever been replaced as well as your o2 sensor?

 

different car this time.

the cat is still factory as well as the o2 sensor, although those rarely go bad for toyota/lexus.

ill also be checking my plugs and wires if any of them is being fouled. gonna do a good tune up.