my 93 civic (y8 motor) has a very eratic idle from a few hundred k to about 1500 k i have checked everything even changed all of the sensors on the mani so im thinking the cam could be very worn is this possible? the other thing im thinking is that i can change my intake manifold to a d16z6 (92-95vtec motor) if the sensor connections on the manifold are the same cause im using my stock 93 engine wiring harness.