89 4Runner pickup w/4 cylinders

Jeff Schoneman

New member
Old off-road farm truck was running fine but one day she decided to use only 3 cylinders so I gave her a tune-up; plugs, wires, rotor, cap and fuel filter(that was fun). No help and maybe made things worse as now at times only runs on two but some times at idle on 4. Just a little throttle and she returns to two.

Any ideas?
 
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