no no no no no LOL
the solonoid by the strut tower is the turbo pressure sensor which just tells the cluster what boost to display
if you are losing boost or idling rough or puffing out alot of black smoke... "alot"... then check your intercooler pipes as you most likely have a leak
usually the pipe coming of the turbo to the intercooler is a culprit... also check the hose between the 3000 pipe and throttle body... or if you intake is cracked got a hole etc
basically you are looking for a leak between the air flow meter & the throttle body... if a leak is your problem
please describe in more detail "without caps lock on" what your supra is doing
Thanks