1997 Dodge Ram Van gas pedal stuck almost had wreck?

I honestly don't see how changing the computer could cause this - I would first suspect a broken return spring on the throttle body. With the engine off, trace the gas pedal's linkage (or cable) back to the point where it attaches to the engine (throttle body or carbuerator if not fuel-injected). There will be a shaft it attaches to on the throttle body (or carb). Disconnect the linkage at this point and try to rotate this by hand, it should snap back when released. If it does, you probably have a 'frozen' cable which needs replaced. Don't forget to replace the linkage where you removed it now. If it doesn't, look for a 'missing spring' on the throttle body's side or any place the linkage appears bent or could 'snag' on anything. If the attachment point doesn't rotate smoothly or 'binds', or kind of 'wobbles' in it's holes the shaft bushings need replaced or the shaft is bent and needs rebuilt. While your'e there, regardless, you should take some 3-in-1 oil and lightly lubricate any points where the shaft, cable, or linkages touch any other part.