I have a 92 that was running fine shut it off went out a few hours later and started to leave but could not get the truck to stay running, when I shift into gear it kills the engine. Truck will not idle unless i have my foot on gas pedal, when I rev engine it runs rough like a fouled plug or something. However if I turn the steering whell back and forth it will come out of it and run fine until I move the steering wheel. any ideas