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mlrebel90
03-21-2016, 08:18 PM
i just bought a 93 f150 6cyl 4x4 with around 195,000 miles the truck will free rev just fine but when put under a load falls flat on its face the guy i bought it From did a Complete tune up (plugs, wires, Distributor, rotor button, Coil) brand new computer new fuel pump and it wouldnt go over 30 mph i got the truck changed the fuel filter and what came out was brown and nasty i went through pulled each plug cleaned and gapped them (Previous owner didnt gap) fixed some broken vacuum lines and plugged in a few things that were unhooked truck will now hit 45 but you have to hold it to the floor and any kinda grade makes it fall flat again im looking for some more ideas im thinking maybe change the fuel lines or possibly blow them out if possible any help is much appreciated

FX4Life
03-21-2016, 08:59 PM
Possibly MAF?

Ford Fan#1
03-22-2016, 05:59 AM
i just bought a 93 f150 6cyl 4x4 with around 195,000 miles the truck will free rev just fine but when put under a load falls flat on its face the guy i bought it From did a Complete tune up (plugs, wires, Distributor, rotor button, Coil) brand new computer new fuel pump and it wouldnt go over 30 mph i got the truck changed the fuel filter and what came out was brown and nasty i went through pulled each plug cleaned and gapped them (Previous owner didnt gap) fixed some broken vacuum lines and plugged in a few things that were unhooked truck will now hit 45 but you have to hold it to the floor and any kinda grade makes it fall flat again im looking for some more ideas im thinking maybe change the fuel lines or possibly blow them out if possible any help is much appreciated I would check the maf like FX4 life suggested. Or the o2 sensors. maybe the transmission could be it? Is the fluid burnt or dark?

mlrebel90
03-23-2016, 07:38 PM
Im not to experienced with obd 1 code readers but if i did it right maf was 1 of the codes and tranny seems to be good clutch doesnt slip im planning to take out the o2 this weekend see what kinda shape its in throw in a new 1 either way ive read on other forums just browsing that a guy had sort of the same issue and the o2 worked for a few days but **** out again