You are here:

Chrysler Repair/'03 Chrysler 300M; 3.5L V6: idle speed?

Advertisement

Expert: - 1/17/2012


Question
Roland, what should the cold and hot idle RPM be for this vehicle?

Thanks!

Dave

Answer
Hi Dave,
I couldn't find a spec for idle speed as it is controlled by the powertrain control module and is based upon many different factors at the moment: gear position, engine coolant temp, ambient temp and battery temp, battery voltage, vehicle speed, throttle position and manifold absolute pressure. So you would need to readout all those variable with an engine reader and then have to know how the pcm is programmed in order to find out whether the rpm is what it is supposed to be. It is just a fact of life that something that previously was simple is no longer so. Beyond that is that the idle speed in adjusted by an idle air control 'motor' which is operated by the pcm.
Roland

Chrysler Repair

All Answers

Answers by Expert:

Ask Experts

Volunteer

Roland Finston

Expertise

I specialize in Chrysler/Dodge/Plymouth cars, minivans, and SUV's for the model years 1982-2008 based upon my 50-year DIY experience, factory shop manuals and wiring diagrams. I offer fast repair advice to help you minimize repair costs by helping you diagnose and do it yourself. Problems with electronically controlled engines and transmissions as well as body wiring problems are my specialty.

I take questions one at a time between 8am and 10pm CT and attempt to answer within 20 minutes. "Maxed Out" means I am answering another question of otherwise busy, so try again later.

There are answers on file to more than sixteen thousand Chrysler questions at your finger tips: put a few key words in the "find" box (above) or click on "view past answers" for a chronological list of my q and a's. Don't use "Add to this answer" if you still have a question...ask it. As to trucks and jeeps I only have manuals for the '04-'06 model years.

Experience

Five decades as a 'do-it-yourselfer' on domestic and imported cars

Organizations
Yahoo Autos Group called The Chrysler Lebaron Club (co-moderator)

Education/Credentials
Degrees in Physics/bruised knuckles.

Awards and Honors
"Top expert of 2010" and "2011" at Allexperts. Among top 50 experts for years 2006-2009 at Allexperts.

Quickest "average response time" at Allexperts (currently no. 1).

©2012 About.com, a part of The New York Times Company. All rights reserved.