Here are what the TSRM says could be the problem for poor acceleration and muffler explosion (after fire)
POOR ACCELERATION:
High tension cord faulty???
Fuel system clogged???
EFI system problems???
Low compression???
Vacuum leaks: This has already been checked and there are no leaks.
Pulling air between AFM and throttle body: I have no problem here.
Ignition timing: Timing is correct.
Air cleaner clogged: Air cleaner is new
Spark Plugs faulty: Has new bosch plat. plugs
Engine Overheats: Not an issue.
MUFFLER EXPLOSION (after-fire)
EFI system problem???
Ignition timing: Timing is correct
Air cleaner clogged: Air cleaner is new.
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