* Spark Plugs: This is the most likely meaning. The gap for spark plugs varies slightly depending on the engine in your van (it likely has a 3.9L, 5.2L, or 5.9L engine). You must consult your owner's manual for the correct specification. A Haynes or Chilton repair manual for your specific year and engine will also provide this information. Trying to guess is risky and could damage your engine.
* Distributor Points (if applicable): If your van has a distributor with points (less likely in a '92 model, but possible), the point gap would again be specified in your owner's manual.
* Other Components: There may be other gaps in other parts of the ignition system or elsewhere in the van (like brake pads), but these would require more specific details about the component you are working on.
In short: Find your owner's manual or a repair manual for your specific 1992 Dodge Ram 250 van engine to find the correct gap setting. Don't rely on general information – it's crucial to use the correct gap for optimal performance and to avoid engine damage.
