I purchased a 1994 Regular cab F350 5 speed 4X4 a few years back as a future project. It ran fine when parked but smoked when first started for about 5 minutes of idling. Now several years later it doesn't start. I tried starting fluid and it runs until the ether runs out. I heard ether is not good for diesels but didn't know it at the time. This is my first diesel so am asking for knowledge on what would be the first place to look at on why it will not start. The glow plug light will time itself out normally.