AE86 Oxygen Sensor help...

[Ian.G]

Some good news

Yesterday I was put in contact with an ex-toyota engineer who has 12 years knowledge of the 4AGE/4AGZE motor - and best of all he is based in Derby the same is me.

He has noted several things about my car.

The o2/lamba is not active. The car is 100% mapped on TPS.

The TPS is actually mounted on the wrong end of the ITBs compared to how they would be on a 20v. This is because there is no room with the waterway running back into the head

But the good news is there is no major problems with the engine.

What he did find is the base timing was about 34degrees. The noise was det.

One of two things have happened - somehow the timing side of the dizzy has come lose and moved. The cam belt has jumped a tooth (unlikely with the amount it was out by). Timing has been set back to just above standard and the car is running like a dream again !!!

He is having a closer look when we do fairly extensive servicing next week (Fuel filter, Oil, Oil filter, Water system flush and new Coolant, Plugs, All drive belts, Cam Pulleys, Alternator, Tranny fluid, Diff knockback check, Diff fluid and new pumpkin seals)

Hes not sure about the cams until its opened up but then he will at least be able to check all springs, clearences etc. Hes also gonna test the injectors, fuel pressure reg etc.