93 Honda Accord. After replacing motor mounts, coil, distributor and ecu the engine revs when it is put in reverse and when it shift into low gear. Timing is good, bled the coolant system, checked the tension on the throttle cable, checked the vacuum lines. Does not rev up while in park and idles aroun 850 rpm. When put in reverse it revs to around 1300. Any help would be appreciated.