Our 1996 Super Sport Nautique with GT40 EFI, surges at idle from 600 to 1200rpm about 30% of the time, i took of the idle control valve and cleaned it out and it is now a bit better but still does it about 15% of the time, can i just disconnect it and set the idle manually with the butteryfly stop screw? do I need an idle control valve, as it seems to be more useful for cars with aircon etc?
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