Originally Posted by edwin108
What year is your truck? If it is a 1996 or newer (OBD II), you can retrieve the trouble codes with a handheld scanner. If you don't have one, most auto parts stores loan them for free.
Best place to start. would be with the OBD2 if you can. Otherwise, its probably just due for some mantenance. Clean the TB and MAF, Run some injector cleaner, change the plugs and update the ignition system. Change oil and fliter obviously. Probably
'04 XLT SCrew, 3.73 LS, KN Drop in, Custom Magnaflow SISO, 265/70/17 ATs, Westin Polished Steps, Leveled, Tonneau Cover