lumpy idle at 900rpm

But doesn't the fuel run at a higher pressure? Also how would heat affect the viberation if it was something solidly mounted?

 

The tech here told me the timing in the newer D13 is changed through the injectors. The valves never change

 

I could see a bit of it yesterday, looked true, the fan hub looked a little wobbly but I was told it's normal. But also the belt pull behind the fan hub liked a bit wobbly too, but not that bad. I was thinking about unhook ing the belt and running the motor. But again, why only vibrate on a hot motor?

 

I'm headed to your side of the country, I'll check it out tommrow, thanks alot Ben

 

Just an update, today I drove about 2 hours so far, been sitting here and the truck is running perfect, no stumble at all. It's even close to 90 out. Engine temp is running consistant about 190 and I checked the coolent when I took off the pressure cap it bubbled a bit but it didn't overflow when I removed the cap. I have been running empty averaging 7mpg so the truck isn't really working but I thought I would mention it. It almost seems like the viberation has something to do with the high coolant pressure. And I don't think the high temps that happen have anything to do with how hard the engine works. Sometimes it runs normal, sometimes it's hot and viberates