What is the "real" reason why the 07 Tahoe doesn't idle in V4 mode? I've heard a couple of different reasons.

 

Not sure but my intuition tells me that it would idle very rough. ZX probably knows the real answer.[sm=smiley20.gif]

 

I am guessing that is the answer also. I am not an engineer but I am a diesel mechanic and I am thinking that turning up the idle a couple hundred RPM's in V4 mode would have been more efficient than V8. If it accessories that bog down the engine I would also think that could have been detected and compensated for.

 

Go out and unplug 4 of your spark plug wires while your Tahoe’s idling and then report back to us your findings......hurry!

 

i turnd it off completly on my hoe. now i can stop thinking about when its going to kick into V4.

 

Are you holding your breath?....have you passed out yet?

 

Dave,

I tried it and it actually had a better idle. I might just leave it like that. I got about 30MPG average and it had about the same HP.

 

With those 6.73 gears, you'll probably have to drain gas out of the tank every 100 miles or so.

 

Havent got the gears yet. Once I do I might plug at least one or two of the other plugs back up. I dont know I will have to test all plugs and see what combination of plugs gives me the best performance and gas mileage with the 6:73 gears.

 

Now, if really want that sumbitch to run out like a raped ape unplug a couple more of them pesky plug wires.