Hemi is a dog at low RPM

[Jpiette]

Ok folks, hoping maybe somebody here has a direction i should look. Ive got a 2013 Ram 2500. The truck has been great until recently. My truck under 2400 rpm just bogs right down. Once it hits 2500 rpm it takes right off. My gas mileage has dropped horredously. I generally average 16 highway, im struggling to get 11 out if it now. My fuel trims are all right on. Plugs have about 10,000 on them and the front O2 sensors are new. I have a thought, but want to see what you Ram geniuses think

 

[Fast69Mopar]

When you are sitting still, in drive and idling, you hit the skinny pedal and it bogs down? Very slow to accelerate? Any warning lamps or indicators?

What spark plugs are in the motor now?

You said the fuel trims are right on. What is the short term fuel trim for each bank at idle when the engine is warm?

What is the long term fuel trim for each bank at idle when the engine is warm?

What modifications have you done to the truck? Lift kit, bigger tires, tune, etc.?

 

[Jpiette]

Yea it feels like in the old days when you threw way too much carb at a musclecar. It just bogs bad. I checked the fuel trims the other day and my long terms were between 1.6 and 2.3 on both banks and short terms were sitting at 0.0.

My truck is basically stock, i did have a K&N CAI on it, but really disliked it and went back to stock for the time being.

Plugs are whatever the stock copper core plugs were, i cant remember off the top of my head

 

[Burla]

Air, fuel and spark. If air and spark are good, next guess would be fuel. Could even be clogged injectors. Could send that oil for a uoa.

 

[MADDOG]

How many miles on your truck and when was the last time you cleaned the throttle body, replaced the plugs, replaced the EGR valve and replaced the PCV valve?

As colder weather approaches your throttle body can stick, the EGR can stick and the PCV valve can fail closed.

Copper plugs in your HEMI require a 30K mile service interval.

 

[Jpiette]

Air, fuel and spark. If air and spark are good, next guess would be fuel. Could even be clogged injectors. Could send that oil for a uoa.

If it were fuel related though i should see that in my fuel trims and thats just not the case at all. Fuel trims are running just fine