5.7L Hemi stumbles at idle????

I have a '07 Grand Cherokee with a stock Hemi. Sometimes at idle the RPM's will stumble and almost shut off. I just swapped the air filter to a K&N and pulled a couple of spark plugs to check them out. They look healthy. What could be the issue?

If this was the Belvedere there wouldn't be any question. But then the Belvedere doesn't have variable valve timing, multiple displacement, mpfi and all that other stuff.

Suggest taking it to a dealewr and have them hook it up to their disgnostic computer. They'll catch any codes. Also, for around $80 they can upload the latest software.

I had a similar problem with an '06 MDS hemi. It wasn't showing any codes and the new software seems to have fixed it.

Have someone test the battery. Every time a battery starts to get weak, engine acts weird.

Not sure if this will pertain to your 5.7 Hemi, but my 4.7 in my Dakota was doing the exact same thing. I finally located the idle air control valve (with much help from members here, thank you very much), pulled it and cleaned it along with the throttle body. So far, no more stumbling idle problems!

Quote:

---

Not sure if this will pertain to your 5.7 Hemi, but my 4.7 in my Dakota was doing the exact same thing. I finally located the idle air control valve (with much help from members here, thank you very much), pulled it and cleaned it along with the throttle body. So far, no more stumbling idle problems!

---

That's on the slate for tomorrow. We'll see if it works.