sounds like ya mighta cleaned too much sludge out and the pump can't keep up to the increased tolerances ... or ya didn't clean enough of the diesel out ... or ya knocked loose some chunks of sludge too big to get out the drain and they get sucked up against the pump intake .... so yeah, does sound like ya need to open'er up!

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics