Hello - when the truck is cold (30s or below) until it warms up, there is a pretty good 'chatter' that appears to come from two areas -- under the drivers seat and under the dash up by the drivers feet... it will chatter briefly depending on how cold it is, then for the first few miles of driving it will chatter randomly anytime I hit a bump. Is this possible the DEF pump or lines?
Freezing temps. and DEF Fluid..
in F-Series SuperDuty Forum
Posted
Hello - when the truck is cold (30s or below) until it warms up, there is a pretty good 'chatter' that appears to come from two areas -- under the drivers seat and under the dash up by the drivers feet... it will chatter briefly depending on how cold it is, then for the first few miles of driving it will chatter randomly anytime I hit a bump. Is this possible the DEF pump or lines?
thanks