sohcs have more low end power than dohcs. dohcs have more tq in general but its more up high, the sohc is known mainly on its low end tq bias over the dohc... so no you shouldnt have problems with that. I have no issues with my sohc.... check normal tune up procedures air filter/fuel filter/ cap/rotor check your plug wires and plugs so on / so forth. looking at your plug tips tells you alot about the way your engine is running. i.e. if its rich they are black, etc and so on. id start swapping parts around with a friend till you find out whats doing it. maf would def cause power problems.
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