this is a d15 vtec Z6, CRX that seems to run way under temp now that its 50 degrees F outside but was fine in the summer months. could the fact that i don't have a skid plate be the problem? it heats up fine at idle not moving. but when i start driving it drops to allmost nothing. anyone know what the operating temp of the JDM D15B with Z6 head is supposed to be?