Consequences of not hooking up VTM wire (VTEC oil pressure input) in V-AFC install?

[hsunchen]

I put a V-AFC in last night; it's on a B18C1 with P28 ECU. I didn't hook up the VTM wire because, well, it didn't make sense to me at the time to bypass that signal.

I lowered VTEC to 4500 rpm and it still works. I've read that the VTM wire is there to fool the ECU into thinking oil pressure is always fine, but isn't that sorta a bad idea? Kinda like intentionally bypassing the knock sensor (yes, I realize my P28 doesn't have the capability to respond to my knock sensor)?

If I never throw a CEL, do I really need to cut off the VTM wire to the ECU and feed it the blue VTM output wire from the V-AFC?

[Weston]

It seems like a lot of people leave that disconnected. And it's hard to find solid info on it. Talk to Evan... I remember him telling me about it when I bought my VAFC from him.

[hsunchen]

I put a V-AFC in last night; it's on a B18C1 with P28 ECU. I didn't hook up the VTM wire because, well, it didn't make sense to me at the time to bypass that signal.

I lowered VTEC to 4500 rpm and it still works. I've read that the VTM wire is there to fool the ECU into thinking oil pressure is always fine, but isn't that sorta a bad idea? Kinda like intentionally bypassing the knock sensor (yes, I realize my P28 doesn't have the capability to respond to my knock sensor)?

If I never throw a CEL, do I really need to cut off the VTM wire to the ECU and feed it the blue VTM output wire from the V-AFC?

OK, I was wrong. I was attempting to set the timing last night, and as soon as I put the jumper in, I realized I DID have codes - a 21 (VTEC). So I figured, fine, I'll hook up the VTM output wire to the line going to the ECU (D6 I think) and pulled the ECU and 7.5 A backup fuse and reset the ECU - still have the code.

I try reversing the wire and putting the output to the other half of that wire, and I get two codes - 21 and 22.

WTF? Anybody have some help for me?