RPM Fluctuation

[Ryan Cruz]

hello guys i'm having some rpm fluctuation at idle, I've noticed it doesn't do it all the time, it comes and goes. I took it to a shop to check the computer and everything came out good. No codes were found. I was wondering if any of you guys had experienced something similar. any info would be greatly appreciated. thank you

p.s. I have a 2013 5.7 Ram

 

[tidefan1967]

Dirty throttle body and/or fuel injectors would be where I would start first.

 

[cwendel]

If it is tuned, could be the tune has issues with colder temps.

2013 2500 6.7 cummins crew cab. white and stock as can be
using Tapatalk

 

[Bigskyroadglide]

Check your intake bolts, mine did that and two were loose caused a vacuum leak.

Don't over tighten, I think torque specs is like 84 INCH lbs or something like that. In some sequence.

 

[Ryan Cruz]

i already cleaned the throttle body, I'll look into the injectors next. thanx hopefully that will be it.

 

[Ryan Cruz]

how would i know if it was tuned before i bought it?

 

[Lyle Longboat]

Spark plugs? Check gaps?

 

[1SloRam]

Having the same issues. Was told intake manifold gaskets need replaced, causing vacuum leak. Already cleaned TB and did relearn, didn’t help. Truck is tuned, but tune isn’t issue.

 

[Allen zhu]

Ryan, is your truck ok? I have the same issues

 

[JohnnyMac]

I know this is kinda basic, but if the defroster is on, the AC clutch will cycle on/off and affect the RPM's. Just a thought....

 

[Allen zhu]

Mine only happens when idling, the rpm will fluctuate, and even engine dead once or twice.but the rpm is very stable when the d gear is engaged.