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Registered
Join Date: Jul 2008
Location: Central Washington State
Posts: 4,435
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I don't know what an ICV is, but I suspect you're referring to the AAR...auxiliary air regulator and yes it's normal to cause a high idle at cold as well as for a minute or so after restarting a warm engine.
To your stumbling, may take some trial and error to sort out. It almost sounds like you're not getting vacuum advance and only seeing mechanical advance as the rpms get beyond 4000. Or perhaps your Permatune or coil are starting to fail, rotor or bad plugs or wires. Of course, could be fuel delivery related to WUR or fuel pressures. Just have to be methodical to check all systems, connections, vacuum lines, pressures, IC o'rings, etc.
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, B&B intercooler, stock 3LDZ.
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