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#1
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Bad Vac Control Valve?
I am having late shifting in a 1985 300Dt (CA; 722.416). So there's a modulator and a vac control valve on the IP.
I have good vac to vac control valve (the valve on the IP). I have good vac to the modulator, and the modulator sucks on the tranny line at about 17" at idle. But when I pull on throttle, pressure only drops to say 14", then jerks around briefly, and even at full throttle I cant get it to drop much below 8-9" (presuming that close to 0 is where I need to be at full throttle). The lack of pressure drop and the jerky pressure needle lead me to believe that my pressure curve to tranny is messed. Now I am trying to figure out whether to purchase a vac control valve or a modulator, or maybe neither. AND, I cant figure out if the line coming off the bottom of the vac control valve goes anywhere; cuz it's just hanging there on mine. THANKS. NEED HELP! |
#2
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Kindly delete this thread.
The original one is identical: Bad Vac Control Valve? Everyone else: Please post to the other thread. |
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