Well just bought a rb20 swaped s13 and get it home and notice when i turn the key off the engine continues to run for like another minute and shuts off and the guages stay on? Unhooked the battery and does the same thing but guages go out once the car stops running. Seems like the fuel pump is shutting off when i turn the key off causing the engine to starve but everything else stays on. But if i disconect the battery and reconnect it, it turns off the guages and they remain off untill i turn the key and start all over. Any help would be great.