Ive been having stumble problems around 2500RPMs and up..including WOT. Its fine at idle. Ive checked almost everything except fuel injectors, and have yet to replace the plug wires. The plug wires are something I AM going to do very soon when I get job (just got laid off..dont have any money lol).
The guy at the auto parts store said (and I know they dont know very much in most cases lol... )..but he said that it could be fouled fuel injectors..? He told me this K44 stuff ($20)...works great and it would help me rule out the fuel delivery system if I use it...pour it in an empty tank, run it down and it'll clear out crap in the gas tank and the fuel lines and stuff...including injectors. Could injectors be a reason for this consistant stumble?