Well I see you can have the 3 cylinder high idle on the smarty and it says its available on all settings. What do you have to do to get it to work or does it work automatically once it gets colder out or something?

Sorry if its a dumb questions, but, I have no clue on anything about high idle at all.

 

The 2nd gen high idle is based on temperature only. No way for manual activation. Here is the detailed criteria for operation.

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Once enabled, idle speed will slowly ramp up from 800 rpm to 1200 rpm when all of the following conditions are met:

1. Intake Manifold Temperature less than 0°C (32°F) and,
2. Coolant Temp is less than 60°C (140°F) and,
3. The Transmission is in Neutral or Park and,
4. The Service Brake pedal is not depressed and,
5. Throttle = 0% and,
6. Vehicle Speed = 0 mph

Additionally, if Intake Manifold Temperature (IMT) is less than -9°C (15°F), and all of the parameters above are met, three of the cylinders will be shut off upon reaching 1200 rpm, creating a slight change in engine sound which is normal. This allows the engine to create increased heat in the cooling system, allowing more rapid engine warm up and cab heating.

Both features will automatically disable when one of the following occurs:

1. The Automatic Transmission is placed in gear (forward or reverse) or,
2. The Service Brake pedal is depressed or,
3. Throttle position is greater than 0% or,
4. Vehicle Speed is greater than 0 mph or,
5. Coolant Temperature is greater than 79°C (175°F).

Engine speed will return to normal operation at 800 rpm. If the engine continues to idle and coolant temperature is at or below 60°C (140°'F), the feature will reenable. In order to operate properly, the Accelerator Pedal Position Sensor (APPS) must stay at idle.

NOTE: ANY TYPE OF AFTERMARKET IDLE SPEED KICKER THAT ACTIVATES THE APPS WILL DISABLE THIS FEATURE.

Use of the 110V block heater will not allow the feature to function after an overnight soak. If the vehicle is left idling, without use of the block heater, 1200 rpm operation will begin when the intake temperature drops below 0°C (32°F) and coolant is less than 60°C (140°F).

 

This is also a question that I have not been given a clear answer on as well. I want to know at what water temp is the 3 cylinder high idle enabled and at what temp it is disabled. I would also like to know what the "enhanced cold weather driveablily" function invovles. I would like to know from Bob or someone in the know. A few guys come on here and say that the Smarty did this to them or that, but what precisely is the Smarty doing in these reagrds. There must be exact parameters as this is all software. There shouldn't be any "sometimes it does this and sometimes it does that". Could we get some clarification please. I would like to get less vague info in regards to the Smarty in certain areas.

 

Justin, I posted just as you did, thanks for the info it is very helpful!!!

 

So basically when it's an automatic type thing? Whenever the manifold is less than 32F it will enable automatically?

Then once everything gets up to normal operating temps it disables itself?

 

Right, the key here is manifold temp to 32*F. Just because the ambient is below freezing, you have to have sub-freezing temperature air in the manifold at the IAT. So unless you've been parked long enough to let the engine fully cool, you won't get the high idle.

Once you hit operating temp it will shut off, then kick back in if temperatures drop again. We actually tried this one of the few times it was cold enough in DFW to test it.

 

I see, so basically seeing as my truck is a daily driver I will never use it? Just have to start it up and let it warm up before taking off I guess.

 

Depends on where you're at. I know it's cold enough in the northern states to cool a vehicle quickly. And we have people mentioning here about their 3-cylinder idle kicking in as well, so it gets cold enough.

Whenever you fire it up, if it's going to kick in, it'll ramp up a minute or so after you get started up.

 

This is what I love about Smarty. It helps solve a lot of problems. We were out with the sleds last winter. I was sitting in the truck with it running. Ambient temp was -10F. My water temp would drop right off the scale on the gauge as I was idling. Sounds like the high idle 3 cylinder cutout would help this situation. Also Justin, do you know what the "enhanced winter driving characteristics" are, as described on mads website. Is it what we have been talking about or are there other things involved when using no.1 fuel?

 

Also, it takes about a minute before anything actually happens. The truck will go through the normal cycling of the grid heaters for approximately a minute and then the truck will slowly ramp up to 1200 RPM... if it's cold enough for the 3 cylinder high idle, the truck will then sound like it's going to fall apart.

 

If your truck sits overnight in sub-32 temps, good chance it will high-idle the next morning... it depends on just how cold it gets and how long it sits.

 

This one I'm not sure about. I believe it's some enhancements to run better in the cold temps with winter fuel, but you might check with Bob Wagner to see if he can give you specifics.

 

I love the 3 cyl cutout. I get it up here pretty regular in the winter.

 

I thought a rod was gonna install a skylight in the block.