I have a 92 CX with an obd2 B18b engine. I bought an SI guage cluster because it has a tach and I've read on many many forums that this should be plug and play. When I start the car with my new cluster, the RPMs show 3500. The engine is definitely not sitting at 3500. Then the temp guage starts off at the half way mark. So I'm getting a false reading on my tach and temp guages. I'm not sure if this a wiring issue, or what? Any help is appreciated.