JRSC Fuel Enrichment Relay

[98BlackTeg]

What is the theory of operation for this thing?

[JRCivic]

Simply put...

When boost pressure is detected, the resistance in the IAT circuit is modified to represent a -32'F value... which is reported to the computer. The computer increases the fuel delivery because of the IAT value (colder, denser air requires more fuel) and thus richens up the A/F slightly under boost. This coupled with the 5:1 rise rate FMU makes for a protective A/F value under WOT and boost conditions in almost all JRSC vehicles.

[LemonSi]

Hey JR,

Got a question for you. This relay crosses to the intake sensor correct? What if I am running a JDM b16b with JDM harness and it doesn't have the sensor to the intake? Can I run it somewhere else? To get the relay working? Thanks in advance!

[JRCivic]

The JRSC instructions require you to acquire the IAT sensor that is installed into the intake manifold... which means that you would remove the block-off plate on the back of the manifold near the driver's side corner and install the IAT sensor there... and THEN you can wire the Fuel enrichment relay components as instructed.

Now, if you happen to be using the JDM CTR computer, you will have to connect the fuel enrichment relay to the IAT sensor found in the intake pipe (between the air filter and the throttle body).

[LemonSi]

PM'ed you JR.