I recently purchased a 1998 Regal Ventura 7.0 SE with 334 hrs. I am not certain if the engine is EFI. Can I attempt to set the choke.
KNA - Determine if you have EFI first. Look at the top of the engine. There should be a shroud of some kind covering the intake area. If you can, look under the shroud. You'll see a carb. or a throttle body(EFI). If you don't know, ask someone that may know to look at it for you. There also should be some decals on the shroud identifying wether or not the engine is EFI. Once you know what you have... Here you go - Carb. chokes are just that- they "choke" the amount of intake air down so the engine runs fuel rich until the choke butterfly fully opens and allows max air intake. There are two types of mechanisms that open the choke butterfly. One is a "stove" that uses heat from the exhaust crossover in the intake manifold. This heat is applied to a spring that expands and uncoils. A link arm attached to the end of the spring opens the choke butterfly as the spring expands with heat. The other type is an electric heating element powered by the ignition circuit that essentially performs the same function as the intake stove type. Electric chokes are adjustable. If you have a carb., and it has a large, circular puck on the end of the choke butterfly shaft, and it has a purple wire and a black wire going to it, then you have an electric choke. Look at the side of it(usually black), it should have an arrow on it indicating the direction in which to rotate it for richer or leaner choke. ...If you have an EFI engine, there is NOTHING externally adjustable for the "choke". On EFI engines, the ECM(computer) determines the amount of fuel the engine receives based on feedback from several sensors(eng. temp., baro pressure, intake air temp, throttle position etc.). The ECM knows when the engine is cold and will enrichen the fuel delivery much the same way as a mechanical choke on a carb will.
Bottom line: If you have an EFI engine and are having cold start issues, you need to have a diagnostic tool connected to the engine to find out what is happening(call a mechanic!).