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surging idle
ooops silly me i assumed[there's that word again]that you knew about the automatic idle valve on the engine and this is controlled by the large relay under passengers feet.this is more common than the valve itself.other thing is the overvoltage protection relay which supplies pwr to the idle valve control unit.this relay is under the hood not far from the brake booster,next to two other bigger relays in front of windshield.my gut feeling is the idle speed control unit because if the ovp you should get at least one other lite pop up on instrument panel.
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