Help Toyota Mark II JZX110 Check engine on TRC blinking

[bhaule]

Hi there
its my first time here and find the forum very interesting and helpful. im living in Tanzania, Africa, owning a Toyota Mark II IRS, JZX110 D4 vvti engine. i recently noticed a check engine light on and trc light blinking when the car engine get stressed or driven for say 10km.it may go off after 5-10minutes and sometimes may last for 20minutes+.when the lights get on, the idle is rough, rpm gets between 600 to 1000. i always use high octane gasoline and change oil after every 3000km. access to quality motor vehicle service is trick here but i have some basic skills in car mechanics.any one to assist please

[bhaule]

actually i conducted a manual diagnosis through OBD port (got instructed by toyota technician - linking port #4 and 13, followed by reading the pattern of the on dash light flash when switch is on, very interesting) replied to them my findings and mentioned error 96; said possibly oil clog at the vvti line (OCV). i popped the hood and took the mesh off, it was not clogged (simple to say), tried reconnecting the sensor ports too. tried the engine on and a little drive but still lights are on