2018 Ram 6.4l Hemi Towing Issues

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Narg

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Just FYI, It's my understanding octane does not increase power. That's not what octane is about.

From https://www.amsoil.com/newsstand/articles/high-octane-gas-boost-performance/
When motorists see premium 91-octane gas at the pump, they may assume it contains higher energy content compared to regular 87-octane gas. After all, “high-octane” is often synonymous with increased power and performance. The 91-octane gas should, they think, provide improved fuel economy and power. In fact, octane has nothing to do with energy content or quality – it’s a measurement of the gasoline’s ability to resist engine knock. Higher octane denotes greater knock control.

Also, I do know that using lower octane than needed can lower power, but not like you think. What happens then is knock sensors in the engine will adjust timing due to an increase in knocking from too low octane causing a lowering of power in some cases from wrong timing.

Also, if your engine is not running up to it's full capability and knocking due to an issue, knock could affect power from that same sensor issue. Might look into engine cleaning and a full checkout by a reputable service shop.

I agree with others here, the setup is too near load or possibly overloaded. (how much stuff is in the truck too?)

Lastly, in regards to your original post a Peddle Commander would do nothing for adding power. It just causes the normal power the engine can produce easier to manipulate through the peddle with lighter presses.
 

62Blazer

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TFLtruck constantly does YouTube videos of towing up the Ike Gauntlet (up to the Eisenhower tunnel in Colorado) which is an 8 mile stretch of I-70 that is up to a 7% grade (steepest grade on an interstate you will find), and also up to 11,000+ elevation so some power loss. Do some searching as they have several videos of different 6.4 Hemi trucks doing this at maximum towing weight. Believe they had at least one at 20,500 total weight (truck + trailer) and said it was down to 30 mph at some point in time.
 

ramffml

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Just FYI, It's my understanding octane does not increase power. That's not what octane is about.

Octane does not increase power, but it can increase the ability for your engine to get to max power. The difference is subtle, but yes, with low octane your power is cut by the computer. Even with 91 octane my engine will ping slightly when worked hard. Maybe I'm just buying crummy gas but I've tried several different pumps.
 

Bob Macknight

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not for nothing,this issue has been there since new. I have not read any replies that mention brakes. Is it possible that the trailer brakes could already be causing an issue due to improperly adjusted controller causing drag at the trailer wheels? If you dont have a hand held temp gun,just hold your hand slightly away from ALL the trailer wheels to see how hot they get
 

Narg

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Octane does not increase power, but it can increase the ability for your engine to get to max power. The difference is subtle, but yes, with low octane your power is cut by the computer. Even with 91 octane my engine will ping slightly when worked hard. Maybe I'm just buying crummy gas but I've tried several different pumps.

Exactly, and if there is a difference over rated octane then I'd have the engine checked for performance degradation causing issues.

One note I forgot to mention, I believe all RAM V8's are rated for 89 or above. Not 100% sure on the 6.4L in the particular year on this one though.

P.S. "crummy gas" could be a thread all it's own :)
 

Narg

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not for nothing,this issue has been there since new. I have not read any replies that mention brakes. Is it possible that the trailer brakes could already be causing an issue due to improperly adjusted controller causing drag at the trailer wheels? If you dont have a hand held temp gun,just hold your hand slightly away from ALL the trailer wheels to see how hot they get

I carry one of those laser thermometers with me when I tow these days. I've had a trailer loose wheels due to brake issues, and check them occasionally just to make sure. Scary stuff when a wheel catches fire and flies off.
 
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Jversagejr

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My vehicle has the integrated break controller. I have it set at 6.5. I am not certain if there is an issue as I don’t feel any drag from the trailer when driving flat roads or down hills.

The issue seems to be happening only when towing, driving under normal conditions I have no problem with power loss in 1st gear on steep inclines. I am also wondering if there could be an issue when using the tow/haul mode messing with the transmission.

Again I thank everyone for their input and there seems to be a lot of variables that could be taking place.
 

Willie Mosher

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The 6.4 like to running at 4000 RPM
Under load. ( maybe environmental tuner, gas cleaner at high rpm vs slower
Lugging the engine)

2nd now days the gas pedal go to transmission not the carburetor,
( ECU )

HOT , Dry, low elevation is need high
Octane gasoline, some high Elevations states sale 85 octane, ( ? Above 5000 ft??)

lower gear sure will help 4.10 or 4.30

If you have over side tire ? Need go back
To OME , did it come w 17 18 or 20?
Sine you got the truck used maybe
One up size the tire?
Willie 2.5 cent,
 

JS4024

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2019 6.4, I would tow the hell out of that all day long, unless I were towing in mountains in Colorado... even an oil burner will run out of air... don’t expect a truck to pull a load like there is nothing there!
 

dhay13

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Correct on octane. Higher octane does not add power but will let your engine use the power available. I hear people say they put 100+ octane fuel in their stock 1988 Buick and it ran great. Uhmmmm....ok. Octane is a resistance to detonation so if your engine is in a situation that is conducive to detonation then a newer computer controlled vehicle will pull timing to protect the engine. With higher octane fuel knock sensor is less likely to detect detonation so will leave the full timing in.
 

Digger Dan 188

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Could the issue be a restriction in the fuel filter? A lot of fuel these days has “crap” in it. Sounds like the engine maybe starving for fuel in 1st with high rpm. Loaded- hi rev- = lots of fuel demand!!

try changing the fuel filter and get to a cat scale and get weighed!! Best 12 bucks you’ll ever spend!

Good luck and Be Safe!
 

tjfdesmo

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My 6.4 did not have a serviceable fuel filter, just the sock in the tank.
 

Anthony Kalos

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Used Truck ???
Might wanna check out the Catalytic Converters !!!
They go bad (clogged) over time if engine burns oil !!!
 

slbenz600

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I am certain this topic has been posted several times but I am looking for some suggestions to improve the towing on my Ram 2500. I tow a 10000 lb 5th wheel camper and have 3.73 gears and completely stock. The truck tows fine on flat and somewhat flat roads but struggles when pulling hills. I do use the Tow/Haul mode and lock out 5th & 6th overdrive gears.

When going up steeper hills the truck will downshift into 2nd and sometimes 1st gear. When it goes into 1st gear for some reason will not rev into the higher RPM range and seems to lose power almost to the point it as if it is going to stall.

Since upgrading the gearing is out of question due to cost, I am trying to figure out if I need the transmission reprogrammed, a custom tune, a Pedal Commander or a combination. Any advise would be greatly appreciated.
 
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I have an 18 6.4 as well. Seems like it will only allow it to run at very high rpms before it starts backing down the rpms for you. Pulling my 8-9000 lbs camper up a hill and it also started loosing power. Definitely something in the computer to protect the engine I'm guessing.
 
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Jversagejr

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I have an 18 6.4 as well. Seems like it will only allow it to run at very high rpms before it starts backing down the rpms for you. Pulling my 8-9000 lbs camper up a hill and it also stsrted loosing power. Definitely something in the computer to protect the engine I'm guessing.

So maybe it is just the way the truck is programmed from the factory as you seem to experience the same issue. I am wondering if this is something the dealer could reprogram or if a custom tune could change it?
 
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