Joined: Jan 2018

Posts: 1,903

Likes: 180

From: Mississippi

If you have an OBD2 ECU in an OBD1 car, such as for swapping a B20 into a 95 Civic and using a CRV ECU, these little modules will keep your check engine light satisfied for the evap system. I’m running one on my J-swapped Civic and had it on my B20 swap, too. No evap codes!

Joined: Nov 2005

Posts: 15,554

Likes: 309

From: Still hunting that foo up there

Joined: Jan 2018

Posts: 1,903

Likes: 180

From: Mississippi

It simulates the EVAP bypass solenoid valve, the EVAP control canister vent shut valve, the EVAP purge control solenoid valve, and the fuel tank pressure sensor.