Radiator hose blew coolant, over engine, started misfire, dried off w/compressed air, dried out cylinders, plugs, coil packs etc, reassembled, starts fine, still has misfire that gets worse as a load/accleration applied. New battery, checked with multi meter, 12.7 V, alternator pumps battery to 13.5V, at idle, seems electrical has voltage. History -just bought Drove truck 1,000 miles, ran fine until coolant blowout. Has no CEL, no codes. Either the CEL been removed or??? Ive read ECM wont trip a code for spark plugs, wires. has 159,000 miles? Thanks in advance.