Question about 1993 Audi 100
This happened after the cylinder heads were removed and replaced. Poosible the vacuum hoses fitted incorrectly?
The cable was probably not reattached to the throttle body, or the wiring for the cruise module was not plugged back in. The VW/Audi cruise control system does not use engine vacuum, it uses it's own vacuum pump. Vacuum runs from the pump/control module to the vacuum reservoir that pulls on the throttle cable. The is also another vacuum line that runs to the brake pedal, which is a safety feature (press the brake pedal and the vacuum to the vacuum reservoir is instantly cut, releasing the throttle and disengaging the cruise control.)
Posted on Aug 11, 2009
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Posted on Jan 02, 2017
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