Anthony_TN
Member
I've got a '68 4000 diesel that just all of a sudden started running rough and loss of power after it warms up. It'll run good when first started for a while, then start running rough and losing power. It gets progressively worse, and would barely pull itself up a hill getting the tractor back to the house. Next day it will start up fine, and do the same thing after working it a while. I've cleaned the air cleaner, put new fuel filter on it. No changes from that.I haven't messed with the fuel tank yet, but it seems to have a good flow coming from it to the filter. The two flexible fuel lines from the fuel filter to the injector pump were cracked badly, so I changed them in case it was sucking air in from the hoses. It ran fine for about 30 minutes after that, but then started acting up just like before.
So what should I check next?
So what should I check next?