Hello all:
I still have code 44 on the 86GT. Its factory and runs well but I want this code gone.
I investigated the entire Thermactor system and think part of the problem was the vacuum routing. If I read all the books correctly, the TAB solenoid is the one closest to the engine and the vac line should run to the front most air valve, the bypass valve. The solenoid closest to the fender is therefore the TAD and the vac line should run to the air valve closest to the firewall. Might explain higher engine temps. According to the 86 wiring diagram this is correct. Two wire terminal is TAB, which is the front air valve. Your thoughts please.
I also recently removed the crossover tube from the rear of the heads and made sure it was clean and properly attached. It is now. I took a speedometer cable and ran it into the drivers side cylinder head to see if the passage was clogged. Its wide open. But still the code 44.
The O2 sensors are not new but relatively low mileage. I have no codes about them but they are worth a look.
My guess is the smaller tubes that pass the Thermactor air into the exhaust header are clogged and that is why I get a code. I used the STAR tester to get codes and may not have erased the codes properly. I'll try again in the future. After rerouting the vac lines I went for a short test drive. May need to drive more.
Car runs well and I suppose only pollutes slightly more with the code.
Suggestions are most welcome. Thanks everyone.
Cheers.
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