my idle on my 85 supra runs between 1100 and 2000 back and forth. what can cause this and how do i fix?

were you able to check the isc valve??

get some ether/engine start/starter fluid and spray it around your intake manifold, i think you may have a large leak there

does it sound like its leaking?

also moved to mk2 section ;)

is your pulley set at 10* or close to 10*.. if you way off or to low it can happen to