Okay, I have a 95 Integra LS with a GS-R swap. I have been running a chipped p28 ecu with mugen program in which vtec hitsat 5800 rpm.
Well I installed a VAFC on my car some time ago, and lowered the vtec to 4500 rpm (low to high cam) and 4400 rpm (high to low cam). I also did some leaning out on the fuel...

I just recently purchased a stock OBD1 p72, so before I installed it, I reset my VAFC. When I reset my VAFC the setting went back to normal with fuel settings at 0 and vtec engadgment at 5800 rpm (low to high cam) & 5400 rpm (high to low).

After I installed my OBD1 p72, and checked the VAFC settings, the VTEC setting was still the same which is weird because I thought the stock VTEC settings on a p72 is 4400 vtec engadgment.

So I just lowered the VTEC settings to 4500/4400, and drove my car. Well my car isn't hitting VTEC anymore.....I don't hear it at all, which was the never the case before. I have always heard VTEC in the past whether or not it was set at 4500 rpm or 5800 rpm with the chipped p28.

I have an exhaust and AEM CAI on my car...

Help!