Why is the map sensor on a 93 1.5L civic on the cars body . While a 94 1.5L civic map sensor is the same as a 1.6L sohc Vtec , on the throtlle body. I want to know what the difference is because the 93 1.5L has map sensor wires that run from the ecu to the map sensor where as a 1.6L or a 94 1.5L have the map sesor wires in the body harness to the ecu and have the engine harness plug into the map sensor on the throttle body. I'm asking this because I put in a d16z6 ina 93 sedan and I'm having map sensor problems. with map sensor plugged in it idles at 2000 and bounces, the car actually runs better with the map sensor unplugged and idles at 1600 when cold.