So I have 1994 7.3 idi factory turbo that starting running rough after a drive on the highway. It starts perfect cold and hot and never stalls. The weird part is it seems to fix it’s self every time I take the supply line from off the filter but after a drive for 3-5 minutes it goes back to being rough and having grey smoke. I’ve tested all my injectors they seem to check out and all the spray from loosening them seems consistent. I’ve took out the fitting with the glass ball and it seems to function correctly and blown out my return lines out as well with having no effect on the rough idle. The only thing that seems consistent is at 1500 rpm’s it’s always a bit more shakey.
I’ve narrowed down the problem is in the engine bay by allowing it to feed from a fuel can. Any diesel mechanic I find can’t explain why it acts better when I unhook the feed line then reconnect but resumes running rough after going for a drive.
I’ve narrowed down the problem is in the engine bay by allowing it to feed from a fuel can. Any diesel mechanic I find can’t explain why it acts better when I unhook the feed line then reconnect but resumes running rough after going for a drive.