[Jimmycash]

Hi,

I would like to hear from other Renegade owners as to what their 2.4L engines idle at when started cold. Mine idles at around 1300 RPM and then goes down to about 850 after it warms up.

I'm not one to sit and wait for it to drop so when backing out of the garage I
have to keep my foot on the brake and then shift into drive still at 1300.

Thanks.

 

[AzRenegadePilot]

Mine does this as well, even when it is 95 degrees here in PHX. It must be just a four cylinder thing. My girlfriends Cruz does the same thing on the first start up of the day.

 

[Rammer]

My Wrangler does this also. If I bump the gas pedal, the idle goes down. I don't Drive the Renegade much, and haven't tried that with it yet.

 

[MJAB]

The higher idle rpm nn a "cold" start up will allow to reduce emissions since components of the emissions reduction systems have to reach their working temperature, for example the catalytic converter will not work at low temperatures.
To reach the newer emissions limits car manufacturers have to find a way to reach working temperatures as soon as possible.

 

[Rammer]

I tried bumping the gas pedal to see if it drops the engine RPM's and it doesn't do that like my Wrangler does. It does seem like it really wants to go when dropping it in reverse.

 

[raz-0]

I tried bumping the gas pedal to see if it drops the engine RPM's and it doesn't do that like my Wrangler does. It does seem like it really wants to go when dropping it in reverse.

There's two ways of doing it. High idle that sticks until warm, and high idle that drops once load is applied. Usually option one was like 900-1000 rpms. Option two would be 1100-1300.

This sounds like they are pushing the idle for emissions. But usually you also get a higher stall speed on the torque converter for emissions too, so it shouldn't pull that hard.

Had a truck way back where there were idle issues. Idle was WAY above the stall speed. Could hit about 20-25mph without your foot on the gas.