Truck has no codes acts like its missing but when you pinch injector hoses it slows engine.New coil new wires new plugs.It shows requested 24deg on timing but shows actual at 5 to 15 changing rapidly to fast to keep up with.Operator said back of lift got hot, glowed red.Compression at 185 +- 5 psi.Injectors changed with good running truck.Timing belt checked not jumped.Sprayed with carb cleaner / brakeclean to check for vacuum leak.Any clues?Thanks in advance