I changed my spark plugs today and at the same time cleaned my throttle body with some NAPA carb cleaner. When the car starts, it idles fine around 800 rpm. If I push the gas and rev higher, it will stick at that RPM. If I rev past around 2200 it will come down and stick at 2200. When I tapped the throttle body with a hammer, the RPMs come back down to 800. It seems that the throttle body is sticking for some reason. Is there any lube that I would need to put on the butterfly to fix this problem or is there another fix? Thanks.