I have purchased the high idle switch and it is due to deliver today. I have also rented a Smarty from DAP to activate the 3 cylinder high idle mode. Just looking for a few pointers on the install.

 

I have read the install article: High Idle Install

 

I know to unhook my batteries prior to install and take my time to ensure I don't bump any other wires that might cause issues down the road. The switch install seems pretty straight forward.

 

My main questions are with the Smarty. What is the process for enabling high idle?

Plug in Smarty. Does key need to be on?

After plugging in the Smarty I'm lost. Thanks in advance for helping out a newbie.

Edited December 5, 20177 yr by Red Rambler

Just curious, as warmer weather approaches soon. Is there a time or an ideal temperature where MPG mode is not effective, or will it always get better fuel mileage no matter the time of year when the truck is in MPG mode?

You can run it year round if you wish no harm will come.

 

Basically, if the IAT temp falls below 80*F then you need the MPG mode to keep the ECM from cranking up the timing excessively. 

4 hours ago, Mopar1973Man said:

You can run it year round if you wish no harm will come.

 

Basically, if the IAT temp falls below 80*F then you need the MPG mode to keep the ECM from cranking up the timing excessively. 

So in other words for performance tunes shut it off back to iat ? Or not necessarily 

Depends. 

 

Now like Edge Comp or Edge Juice I would run it all the time because of the factor of the ECM advancing timing hard below 80*F. Now where the Quadzilla basically ignores the IAT temp completely once the Quadzilla is in RUN mode and warmed up. 

That's what I've noticed too unless quadzilla doesn't display all timing just what it wants or thinks.

Quadzilla only displays what is commanded not what is actual timing is.

Yes now that you said it I remembered you and maybe Nick discussing it. So will a obd link show true timing or how can we see what's really happening. 

1 minute ago, Dieselfuture said:

So will a obd link show true timing or how can we see what's really happening. 

 

No. There is no way to measure true timing. As far as what I understand of the Quadzilla it can only pick up the ECM signal for timing then modify the value then add a priority bit the communication to force the override of the timing value through. It just assumed that displayed timing is actual timing till there is a pump malfunction (P0216) then you know the timing number is no longer what is actual timing.

@Mopar1973Man so it's got to be pretty close especially at cruise state when not a lot happening and it's somewhat stable. I would guess. 

Properly operating VP44 it should be right on the money but we all know that everything has an amount of error built into the pump, Quadzilla, etc. So I would say it darn close to being on the mark as long as everything shows to be working properly. Like in my experience when my last VP44 pump failed at 243k miles. I had a P0216 code but the Quadzilla still showed normal timing numbers but OMG! that VP44 was stuck in full advanced and that engine rattled something horrid. So bad the truck would barely roll along at 25-30 MPH. When the pump decided to function and time properly it would run like a scalded dog then something would pop in that pump and timing would go back to full advance. Still the whole time the Quadzilla still showed proper values. 

As long as you dont have a p0216 code the quadzilla timing value should be pretty close.   

 

I dont know what the reference point is for timing, IE 0* TDC or -30* tdc etc.  I just know how much timing advance is commanded.