My car is spiting and sputering and has a tick only when i go down the road the sputter happens every so often and ive had it plugged into a snap-on obd1 it read mass air flow sensor changed still not fixed changed spark plugs vacuum lines pcv valve and theres two lines coming out of the pcv valve and the intake one is plugged up but theres one cut short with a bolt in the end of it its been goin on for two months im lost now do not know what to do anymore please help!!!!!!!!!!!!