Anybody noticing an rpm jump under low acceleration

84lamb250 · Dec 21, 2016

I have a '13 1500 with 5.7. The truck will every once and again jump up in rpm under slight acceleration. Seems to happen right before it shifts and I've only seen it when going slow (2nd to 3rd gear). If I'm just barely on the gas, with constant pressure, the truck will sometimes all of a sudden act like I pushed the gas pedal harder (but I have not moved my foot at all or pressed any harder or softer), and rpm will jump up by around 500 or so. Has anybody else noticed something like this happening? Seems like TPS or maybe something with the computer? It's not like it's jumping in neutral or slipping, it still puts that to the wheels.

R.L.K. · Dec 21, 2016

Subscribed .

My truck 14 Ram 1500 4x4 QC 6 speed auto & 355 differentials with about 43k .

Mine every now and again does this exact same thing!
My rpm jump is only 300 ish though

novelmike · Dec 22, 2016

I will try this tomorrow and see if I have the same thing going on.

J3FF3RSON · Dec 22, 2016

Do you have an aftermarket TB, or is it stock?

To my understanding the TPS sensor is built into the Throttle Body, they aren't separate.

I would most likely check to see if your TB isn't dirty before going and replacing parts.

chrism1367 · Dec 22, 2016

I'm new here, just bought a 2013 5.7 express, and mine has done it once or twice now too. Hopefully nothing that's a problem. I hope I don't regret buying a chrysler

84lamb250 · Dec 22, 2016

J3FF3RSON said:
Do you have an aftermarket TB, or is it stock?

To my understanding the TPS sensor is built into the Throttle Body, they aren't separate.

I would most likely check to see if your TB isn't dirty before going and replacing parts.

It's a stock TB, and honestly this isn't something that really bothers me, doesn't happen all that much and doesn't seem detrimental to the truck so I'm not really tryin to start tearin into it and replacing things. Was mainly just seein if this was a common issue and if anyone had first hand experience on what the exact cause is. I believe I have some warranty left so I may try to go that route if I do anything. That's interesting that others are seeing this.

RamCares · Dec 22, 2016

84lamb250 said:
It's a stock TB, and honestly this isn't something that really bothers me, doesn't happen all that much and doesn't seem detrimental to the truck so I'm not really tryin to start tearin into it and replacing things. Was mainly just seein if this was a common issue and if anyone had first hand experience on what the exact cause is. I believe I have some warranty left so I may try to go that route if I do anything. That's interesting that others are seeing this.

Hi 84lamb250,

If you decide to visit your local dealership I'd be happy to follow up with them for you if needed. Just PM our page with your VIN and let me know!

Andrea
Ram Social Care Specialist

Bobbo · Dec 22, 2016

I had a problem like that, it ended up being the extra power from MDS turning off. I didn't notice it while I was stock but it was very noticeable after I had a custom tune installed. RPM would jump about 300-400 and it almost felt like a nudge from behind. Disabling MDS immediately took care of it.
Good luck.

R.L.K. · Dec 22, 2016

@84lamb250 , what oil weight are you using Sir ?

84lamb250 · Dec 22, 2016

R.L.K. said:
@84lamb250 , what oil weight are you using Sir ?

I haven't put enough miles on the truck to change the oil, dealer changed it right when I purchased it and I'm not sure what they put in

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84lamb250 · Dec 22, 2016

Bobbo said:
I had a problem like that, it ended up being the extra power from MDS turning off. I didn't notice it while I was stock but it was very noticeable after I had a custom tune installed. RPM would jump about 300-400 and it almost felt like a nudge from behind. Disabling MDS immediately took care of it.
Good luck.

Thanks for bringing that up, it kinda seemed like that to me too, hopefully there's a way to get that to stop without disabling MDS

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12sportmc · Dec 22, 2016

Bobbo said:
I had a problem like that, it ended up being the extra power from MDS turning off. I didn't notice it while I was stock but it was very noticeable after I had a custom tune installed. RPM would jump about 300-400 and it almost felt like a nudge from behind. Disabling MDS immediately took care of it.
Good luck.

^^^^this. Mine does the same thing every now and then when MDS kicks on/off.

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shane1981 · Dec 22, 2016

i agree with the others on it being the mds

tuned by Jay Greene

tcazes · Dec 22, 2016

Dang. I like my mds. Don't want to dissable t but it did in fact get quite noticeable after my tune. Oh well lol

Gump · Dec 22, 2016

Mine does it when everything is cold. After a few minutes of driving it stops.

R.L.K. · Dec 22, 2016

Gump said:
Mine does it when everything is cold. After a few minutes of driving it stops.

Mine too , I only notice it when the oil temp is be teen 120 & 150 °

Below 120° oil temp I've read the MDS is disabled

novelmike · Dec 22, 2016

chrism1367 said:
I'm new here, just bought a 2013 5.7 express, and mine has done it once or twice now too. Hopefully nothing that's a problem. I hope I don't regret buying a chrysler

You didn't buy a chrysler. You bought a RAM.

mark.sweetser.75 · Dec 23, 2016

chrism1367 said:
I'm new here, just bought a 2013 5.7 express, and mine has done it once or twice now too. Hopefully nothing that's a problem. I hope I don't regret buying a chrysler

My 2010 is a rock star. Great truck. Not sure about 2013s but don't sweat it.

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Anybody noticing an rpm jump under low acceleration

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