North American Turbocoupe Organization



Cruise Control Vac Tee
Turbo Cruiser Offline
Junior Member
#1
My cruise control is not working. I have changed out my clutch switch because it was bad, checked my switches per the manual, pulled the steering wheel and put dialectric grease on the contacts for good measure, checked the brake light circuit, and checked the speed sensor. The vacuum lines look in tact, but when I looked at the vacuum diagram that was posted here here it shows a tee between the vac tree and the servo. I have a check valve in my car. Could that be the issue?


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Pete D Offline
Administrator
#2
You need that check valve. It keeps boost out to the cruise control. It stops boost from the vacuum "T". That is a checkvalve, not a T fitting , just doesn't come through well in the drawing. The other check valve in the green line from the intercooler fitting stops boost but allows vacuum made at the IC fitting when the engine is in boost. This is done by the venturi affect
Pete Dunham


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Turbo Cruiser Offline
Junior Member
#3
Quick update: after testing all the components, I pulled a speed control computer out of a wrecked fox mustang and replaced mine. Worked like a charm.

Thanks for the feedback Pete.
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