Idling high, then rough............truck has issues....

[0212353]

So...........my truck threw me for a loop today..........need some ideas, thoughts, etc.
2010 Ram 1500 5.7 - headed back from our Easter festivities with family, and I notice that its just.......holding speed like nothing else. Gaining with no foot on the accelerator. I am running a custom tune, so....figure, I'll knock it to the Diablo 93 and see what happens. Pull over, as I'm sitting there in a parking lot - she idles all the way up to 3K...........I shut it off.
Tune to 93. Check idle...........same.
Hearing a hissing noise coming from the front pass side.
Detune the truck........start it.........truck is idling rough, check engine comes on. Lean in bank 1 & 2. Shut it off.........clear codes, fire it back up. Still hearing the noise, but decide to head home (5 miles away). Idling very high (11-1300 at a stop sign). Park it......figure I'll call the dealer in the morning and get it in there - but......any thoughts / ideas?

 

[fasthemiram12]

Try looking at the 2 vaccum hoses that hook right under the tb. See if they are loose or one has popped off.

Or your catch can hoses.

 

[0212353]

guys on FB mentioned that same thing. Going to change my shirt and head back out to take a looksie. ty!

 

[0212353]

LOL

Catch can bolt is loose, it pulled back.........boom - issue.

I'll wait til she's cool again, go crank that bolt back down.

 

[Westwind1124a]

glad to see it was an easy fix

 

[0212353]

me too!

 

[B Red Dodge]

If you haven't already, you may want to throw some blue Loctite on the bolt.

I did when I installed my catch can and I haven't had any issues with loosening up.

 

[0212353]

I'll have to nab some

 

[Arth]

I'll have to nab some

While your at it give that thing a bath!!

 

[0212353]

lol, yeah.............I thought the same thing - I was thinking.........damnit, its dirty under here!

 

[jsl6v8]

I thought the catch can was suppose to protect your engine lol, glad it was an easy fix, it didn't dump oil all over the place did it?

 

[Quigs]

Put a hose clamp on that mother.

 

[0212353]

no oil anywhere, this is after the can - so..........better not be getting oil through there. LOL

And yup, clamp going on!

 

[Lawhand]

glad it is an easy fix, and glad to know to what to check when it idles at 3k LOL

 

[Casper]

Very useful thread. I always suspected that sucking air below the TB would cause idle problems.

Imagine how much worse it would be if the catch can overflowed and you sucked a slug of that nasty up the ole intake--I shudder at the sinking feeling (or engine stutter) that would induce when it happened rolling down the highway at 65mph.

CLEAN YOUR CATCH CAN---CLEAN IT!

 

[Jmhm17]

Its not that big of a deal if it over flows. It wont suck ALL of the oil in. There were times I let my catch can in my SRT4 get full and forget to empty it and it would just suck a little bit in and burn it off, it wont hydro lock your engine.