possible issue with low RPMs at idle

[slack-axe]

I have an '07 300C with approximately 4200 miles on the clock -- all stock except for a Mopar drop-in filter. I have noticed the idle speed from EVIC shows around 520-530rpm, and other times it hovers around 600-620.

Thankfully there have been no stumbles when it gets down to the low 500's, but I'm concerned that might be a little low. From doing searches on the Forums, I see that the RPMs at idle for the 5.7 have a pretty broad range (from 500rpm to 650rpm).

Should I be concerned about it dropping into the low 500rpm range? I use Shell 89 octane consistently, and there have been no issues with performance.

Thanks in advance,
Phil C.

[slack-axe]

Took the car to the dealer today, and without beating myself up too badly, its safe to say that Hemi Knowledge > me


My wife's Charger R/T has the same RPM at idle when hot and A/C not running (and in Drive). At the Dealership, the Tech hooked up the Scantool and could find no codes stored, and said everything checked out ok. Then, the Service Manager and I logged a few miles in the 'C' making sure I was satisfied with their findings.

I honestly think they loaded some Hemi mojo into the C today....I took it out and ripped off a few sub 6 second 0-60 times tonight. And when I did my last run, I yanked the time below out of my butt.....I'll probably never duplicate it again.....but it brought a big ole' grin to my face.

Conditions were: Temp 65F, Level road, 1/4 tank of gas, stick mode, ESP off. The only "mod" I have at the present time is a Mopar drop-in filter.

[SMosher]

how are we getting this timer on the evic from a C?

[Moose]

The 5.7's are a smooth low idle and that is a common number. The low idle is also for fuel saving while idling in traffic and at lights etc. You're fine.

[slack-axe]

Originally Posted by Moose

The 5.7's are a smooth low idle and that is a common number. The low idle is also for fuel saving while idling in traffic and at lights etc. You're fine.

Thanks much for the info Moose!

[Moose]

Originally Posted by slack-axe

Thanks much for the info Moose!

Hey, no problem Slack. I am a 5.7 lover! I have owned two of them now and they are the smoothest most snappy when you need them motors. Right now I've got a 5.7 non MDS in my garage.