Am wondering how much of a tear down will be needed as some *** put something in my fuel tank , took the liftpump and fuel heater off today and found what appears to be sugar in the heater and prefilter need to know if a rebuilt injector pump and injector maybe in my future . the fuel filter element feels slimy so don't know how far the crap made it . 97 Ram 3500 dually with 631000 kms on her . thanks in advance fer the help . EVILSCOTSMAN