I have an Actron model CP9135 scanner and I can only get it to read and clear codes but no other functions seem to be avaliable with my 1997 80's CPU. It has functions like EGR Gas Temp, missfire, compression check as well as some others but none of them will work in real time I guess while driving. Is this scanner just a lower model than what is required to read the 80 completely? Does the Toyota SST scan tool read all of those other data functions? Should I look for perhaps a little better scanner without having to get the Toyota SST scann tool which is I am sure very expensive and more than what I would need? This Axtron CP9135 I picked up at Auto Zone for about $150 a couple years ago. To they make one that is more compatiable with my 1997 80?