Engine Performance problem
1998 Toyota Prado 4 cyl All Wheel Drive Manual 300000 miles

my
prado just recently has lost power i have put new leads,plugs,fuel filter and have cleaned the air flow meter and i have been using injector cleaner periodically the only other thing i can think of is the muffler being partially blokced as the muffler has been ratling for quite a while about 50,000 klms if you could help i would be gratefull.


Regards Mark