when heat is on and i speed up it switches to a/c and vis versa. you can here the heater box shut when it happens.
- posted
18 years ago
when heat is on and i speed up it switches to a/c and vis versa. you can here the heater box shut when it happens.
you have a vacuum leak, or a bad check valve (vcv) in that line.
check all the way to the intake manifold tap.
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