Originally Posted by JTECHSAFF

normally hunting is a sign your base idle is to low,

as the iscv closes the desired idle (desired by the ecu) goes to low,so the iscv opens again to compensate...then it starts over again..


usually if the idle is hunting the iscv is working just fine...raising idle....exactly what its meant to do


to set your base idle, run engine till hot, then unplugg iscv via its grey plug...idle should not drop...if it does,adjust idle to 900rpm via screw under throttle body....then reconnect the iscv and the idle should be stable.

the base idle shouldnt be held on the iscv,with the valve closed or unplugged it should idle nicely at 900rpm


simply adjuting the global modifier,without checking fuelling on full boost is a very dangerous game, as it alters the whole fuel table as a percentage.

tps is a good posibility to,if the ecu spots an opening throttle it opens the iscv,so if tps is incorectly set it can open the idle