So it is looking more and more like the cam bearings are toast or got one starting to walk out in our 07 Denali.
From my research and understanding, our rig has all the DOD components but DOD is not tuned into the ECM.
No matter the end result whether we can just get away with replacing cam bearings, up to full rebuild, if it is the cam bearings, the DOD components are coming out.
Engine Half@$$ subroutine was left UNenabled in the ecm. Engine Half@$$ hardware should come out,
no matter what.
We live in California, so I don't think I can eliminate the VVT and still pass smog.
What's the reasoning behind this thought? Even if CA can visually detect that it was PHYSICALLY removed from the engine,
CA has no way of detecting whether or not the VVT subroutine has been disabled.
I've been over this many times: CA cannot download your tune off the ecm / tcm when they do an emissions test.
CA can only detect checksums and checksum verification numbers, both of which remain unchanged if the tune was written PROPERLY.
If, due to disabling VVT, the engine no longer passes a butt sniff test,
that in and of itself does not conclusively prove the VVT was disabled or deleted.
Has anyone done a DOD delete, but kept the VVT? If so would like to hear your experiences.
Although I haven't done it myself, it's easy enough to physically limit the VVT from INSIDE.
Obviously the tune would need to 'agree' with any hardware changes.
Sorry, no experience myself, but it's accepted that there are VVT cams that don't retard/advance as much as GM OE;
those cams need VVT limiting hardware to operate properly, and the tune needs its VVT subroutines edited accordingly.
So hardware that locks VVT in a fixed position, without removing VVT, would function the same as removing VVT,
if the VVT function were effectively disabled in the ecm as well.
