50* EGT's with 3cyl idle.

[Sycostang67]

I don't think there is any real issue here, just thought this was weird.  I have started my truck the last 2 days with the 3 cylinder high idle engaged.  When I get in the truck my EGT gauge is only reading 50* while the Quad is reading around 560*.  I have both sensors mounted next to each other before they enter the turbo.  When I step on the brake and return to normal idle, both readings equalize.  Does the 3 cylinder idle shut off the first 3 or last 3 cylinders possibly causing this?  I kind of assumed it shut off every other cylinder, 1/3/5 or 2/4/6.  If it matters I am using the moparman switch with the TSB enabled and not the Quad high idle functions.  

[Mopar1973Man]

Pyro has to be in the rear port. 3 cylinder mode runs on 4, 5, and 6. 1, 2, and 3 are dead. 

 

Firing order: 1, 5, 3, 6, 2, 4

 

Bold numbers fire, and the others are dead. Make sure the high idle on the Quadzilla is disabled.

[Sycostang67]

The Quad idle function is off, I heard it would cause issues since I already had the trucks computer updated to activate it.  So the other probe is just getting air blown on it from the deactivated cylinders, that makes sense.  

[YeaImDylan]

With the talk of 3 cylinder idle, I was believing that our 2nd gens can't not run on less than 6 Cylinders just due to how the VP is set up. Is there a way to turn off specific cylinders to check injectors (that may be knocking) and what not?

[Mopar1973Man]

If you have the very expensive older DRBIII tool or the newer Star Scan Tool you can do cylinder shut downs for injection testing.