I need some help.. I finally put in my JDM cluster in my civic.. everything worked for a sec then nothing. The gas needle says my car is full, but its not.. then the RPMs stop working. so i swaped it with the US one same thing it jumped to 4gs and stopped. the car was idling at 1200... is there a way i can fix this or should i buy another one

 

Reset ECU?
Did you do any other work on the car?

 

no just that