5.9 v8 losing power when it gets warmed up

Mattx15 · Nov 18, 2016

i pull a trailer a lot roughly 5000 lbs enclosed vnose with my 2000 dodge ram 1500 and i notice when i first start off in the morning and go to work my truck feels like it has plenty of power on the highway i can run whatever speed i want without dropping to 3rd, however on my way home when i drive through city traffic first then get on the highway i cant seem to hold above 60 without shifting out of over drive, no problems noticed empty, anyone know what might be the problem? is my fan clutch sticking or something? i couldnt hear it making extra noise so i dont know

dapepper9 · Nov 19, 2016

For one, don't pull with 4th turned on. Easy way to burn up a gear. At least don't engage it until you're up to speed and cruising.

As for the warmed up issue i recommend 3 things:
1.plenum fox if it hasn't been done
2. Tune up with new cap and rotor and factory copper plugs or the equivalent in other brands (myself i like ngk bkr6e)
3. Move your intake temp sensor to the intake box tube. These trucks have it in the intake manifold (or kegger as most call it) and the cast aluminum causes it to heat soak and read 150 degrees intake temps pretty much regardless of outside temp or things done to the engine

Mattx15 · Nov 19, 2016

dapepper9 said:
For one, don't pull with 4th turned on. Easy way to burn up a gear. At least don't engage it until you're up to speed and cruising.

As for the warmed up issue i recommend 3 things:
1.plenum fox if it hasn't been done
2. Tune up with new cap and rotor and factory copper plugs or the equivalent in other brands (myself i like ngk bkr6e)
3. Move your intake temp sensor to the intake box tube. These trucks have it in the intake manifold (or kegger as most call it) and the cast aluminum causes it to heat soak and read 150 degrees intake temps pretty much regardless of outside temp or things done to the engine

so ive heard a liitle about the plenum gasket but does that drag your power down when it goes? how hard is it to fix it yourself? and what im trying to say about towing is when the engine starts working hard when i get up to speed and shift into over drive say at 65mph with a 5000 lb load that 360 should have plenty of power to keep it there on flat ground but it just cant do it, im not trying to get to speed in overdrive just trying to maintain it which that truck used to be able to do perfectly fine had it in the family since brand new

dapepper9 · Nov 19, 2016

Not necessarily. Overdrive is a really high gear at 0.69:1 and dodge recommends not using when you're towing period.

Plenum gasket is under the intake manifold. Not hard if you're mechanically inclined, half days work for a first timer usually. Plenum gasket causes the truck to burn oil from the lifter valley.

Mattx15 · Nov 19, 2016

dapepper9 said:
Not necessarily. Overdrive is a really high gear at 0.69:1 and dodge recommends not using when you're towing period.

Plenum gasket is under the intake manifold. Not hard if you're mechanically inclined, half days work for a first timer usually. Plenum gasket causes the truck to burn oil from the lifter valley.

so thats probably my oil burning problem then and the power maybe? i just assumed all 5.9s were gonna burn oil and nothing you can do about it, i can burn bout a quart sometimes on a long nonstop trip 1500 miles ish. so should i replace lifters while im at it then? the truck only has 120000 on it?

dapepper9 · Nov 19, 2016

You can read more about it here:
http://www.ramforum.com/f61/plenum_gasket_what_where_what_should_i_do_about_*info*-37635/

Don't bother with lifters, just do the gasket. More than likely it is your oil burn issue. Double check your cylinder 8 spark plug for fouling.

Mattx15 · Nov 19, 2016

dapepper9 said:
You can read more about it here:
http://www.ramforum.com/f61/plenum_gasket_what_where_what_should_i_do_about_*info*-37635/

Don't bother with lifters, just do the gasket. More than likely it is your oil burn issue. Double check your cylinder 8 spark plug for fouling.

thanks ill have to give that a try

chrisking318 · Nov 27, 2016

Do you read higher temps on the gauge?

5.9 v8 losing power when it gets warmed up

Mattx15

Member

dapepper9

Senior Member

Mattx15

Member

dapepper9

Senior Member

Mattx15

Member

dapepper9

Senior Member

Mattx15

Member

chrisking318

Junior Member

Similar threads

Latest posts

Members online

Forum statistics

Share this page