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You probably have the distributor installed one tooth off. Or if it was doing this before you did all this the timing chain has jumped a tooth. remove the distributor cap, then set the timing mark on top dead center, then have someone watch the rotor and tell you when it moves then check how many degrees it moved. It should not be no more than about 2-3 degrees if more than that you probably need a timing chain and gears. BigD
signs of a bad fuel pressure regulator. the vehicle runs rough, the engine will not start usually in the mornings. many times engine starts but stalls shortly after starting. a bad regulator can result in fouled plugs. black soot on plugs, blake smoke from tailpipe, running rough, stalling. you could have residue in fuel tank and need to change fuel filter again. have a very good day !!
Clean the inside of the MAF sensor with spray MAF cleaner, this is made by a company named CRC, this should help your problem, also go to a Kragen and have a trouble code test run, they will do it for free, post the codes on this thread and I will have a look.