I personally won't be needing one buuutttt

you can get pressure switches on ebay that will either break a circuit or close a circuit at a certain PSI.

Couldnt you just break the o2 sensor output at x psi? Would 15 seconds or so without a signal be enough to trip a CEL?

 

bump, bump, bump.

this thread has me curious now....

slo..you should pm olderguy about this man, he would probably be able to yay or nay.

 

You wouldn't want to necessarily cut the signal. You want to feed the ECU a voltage that correlates to a leaner-than-stoich condition, IE .35V. The ECU counters the "spoofed" voltage value by adding fuel.

If you dig around, there is a schematic floating around. It wouldn't be a complex device to build if you've touched a soldering iron before.

FWIW, the FIC will allow you to feed the ECU any O2 voltage you want. At the moment it's limited to 2D, voltage & RPM. The next software release should have it referenced against pressure as well.

Ryan