I recently purchased a 1985 GS - have no idea of its history. Car started and ran, but had virtually no power - even on flat road - did not even consider taking it out of the subdivision.

After removing the carb and intake manifold I found that the linkage to a butterfly valve in the intake (below the carb) had been disconnected. The butterfly was free to moved to whatever position conditions urged it.

The linkage that connects the butterfly shaft to the coasting valve is worn out, meaning the holes for both pieces of linkage are severely elongated. I am not certain that the valve works, although it passes the tests described in the Haynes manual.

Do I need this valve?
Can I simply lock the butterfly in the wide open position?
What adverse effects would this have on engine behavior?

BTW, it was interesting to verify that a coolant leak was due to deteriorated and broken orings between the manifold and the engine.

Thanks,
Bob

 

this will get far better responses in the 1st gen section.