hello all, I am having trouble with my bronco, it will not stay running on a cold start up unless I press on the gas a little. It is a 1989 302 auto trans. When I first start it up it will idle around 1500-2000 RPM's for a minute then slowly the idle will decrease and the engine dies, after a few minutes of running it will idle on it's own. This has been a problem since I have owned it. Recently I have replaced the plugs, wires, cap and rotor. When testing the IAC valve I get around 9 ohms which the book says it within spec but I get 12.17 volts to the valve when the manual says I should be getting 10.5 volts, Is this still ok? I have checked for vacuum leaks with a smoke machine found only a small leak at the vent on the charcoal canister. Does anyone have any ideas what I should check? Thank you in advance