remove, clean well, and retighten all grounds, if it doesn't have a ground direct from batt to engine, add one, preferably to one of the starter mount bolts - remove plugs, see if it'll turn it with no compression

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