I have a 94 F350 4 door 4x2, with the 5.8 351 engine. It has about 150,000 original miles on the engine. About a year ago it started giving me problems starting. In the morning when you start the truck it starts like it is a carburated engine. You do not have to throttle it to keep it running but it idles up and down drastically, as well as backfires, until finally settling out and running normally. Once the truck warms up it dosent do it again. I have had two different Ford dealerships take a look at it and spend over 2500.00 parts chasing. If anyone has had any type of problems or any advice that would be awesome.