My 90 4rnr cycles at stop lights, btwn 850 & 1300. If I "kick it down" (which I don't understand can be done with electric fuel injection) it will drop to 900 rpm. And over time, it is getting worse. Other-wise, the engine runs like a top. Is this the air flow sensor being clogged up by the use of a K&N air filter? The guy at NAPA said that would coat the sensor wire with oil that would throw it off. Other ideas?


Last edited by Dandeman; 08/25/10 05:10 PM.