My 89 Bronco has a 302EFI in it. I have had this truck sinnce brand new. Just recently it will not stay running when you start it unless you keep your foot in the gas. It just starts, revs up and dies. But as soon as you put it in gear it will idle by itself. I pulled the air bypass valve out and cleaned it and it ran a little better that day, but back to bad the next day. When I'm just putting around and ease into the gas it hesitates, but on the highway it runs great, all the power is there. Here is a nother thing while it was running I pulled the connector off the air bypass valve and the idle droped real low, but ran smooth as silk. You hook it back up and idle speeds up and sounds rough as a cob. One of my buddies said to check the voltage on the throttle position sensor with just the key on at the green and black wire, and I should have .99 to 1 volt no less or no more. I have .90 volts does that mean its bad?