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I got codes 94 and 44 the other night, car is running like crap and I'm trying to trace down the problem.

I removed the thermactor air hoses right after the diverter valve where the two tubes go into the metal pipe which then goes to the back of the heads. With the vacuum line to the diverter valve both on and off, air is only being blown out the bottom tube from the thermactor.

Is this normal? I would suspect it's supposed to blow air out both, with the vacuum biasing one side verses the other.

Also, what's the purpose of the thermactor bypass valve? When does it actually bypass the air to atmosphere?
 
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