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300zx 1984 n/a auto-a/c works good, but when I turn on a/c, idle goes down, instead of up. Any ideas on why????? What wires did I put on backwards??
 

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Find the idle adjustment valve, on top of engine, drivers side on intake manifold, about even with the gray air intake duct. Adjust the screwdriver
slot on the left (toward front side) of the valve. This should get your idle to
reach about 800 rpm when engine is warm.
 
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