4AGE Ignition is Retarding not Advancing


New Member
Aug 8, 2015
Hi all
I just completed a full restoration of a 1972 Celica TA22 with a full AE86 transplant. incl. 4AGE, transmission rear and front axle and suspension. the car is finished and it runs. but! the ignition is not advancing it is retarding! when i rev the engine sparktiming goes the wrong way! it is set at 35deg. BTC and it goes towards zero with incrasing rpm. i am using a AE86 ECU # 89661-12020 i did check the wiring several times and it seems to be OK. does anyone have an idea how to solve this problem?
i think the ignition curve is given by the ECU...