T3 35r
Stock Ecu
Self Tuned

Ok guys I recently installed a QTP 3" cutout valve in my car along with a 4bar map sensor. (Yes WB was relocated and it is BEFORE the cutout).

Got all the settings on the dot for the OMNI 4Bar- Car started just fine no issues. I don't think the OMNI would affect this.......

While the cut out is closed (Running through stock exhaust) the AFR readings during idle are normal 14.7-14.9. Idles without any issues.

If I open the cutout, idle drops to 11.2-10.9. It gets really rich? I simply can't see the reason why? Same tune, nothing touched.

Cruise is the same, WOT is leaner, as expected.

Any input on the sudden richness?

Could it be that when the cutout is open, the load is higher?

This was just an all of a sudden questions guys. I have no logged both closed/open to check Hertz/Load just yet.

 

I'm really not sure what the answer to your question is..all I know is that I have the QTP cutout also. Welded into my Test Pipe, right after my wideband sensor. Mine reads pretty much the same at idle whether my cutout is open or closed.

 

Anyone?