wanted to get info on 12valve cummins as I recently purchased a 1996 with 250k on the dash. Took it to the mech for better mileage11 towing 13 allaround 410 gears. Anyway adjusted timing ran like dung acted like starved for fuel then quit, wont start low compression on 5 cyl spontaneous overheat blew out side of radiator in about 3/4 mile after adjusting timing. any help would be appreciated
