Open and closed loop at idle

[benjohns]

Hi all
I'm got my cam idling very nice
I'm extend the idle time before the op loop takes over and ulters the cam back to a smooth idle

Is there a way in a 2006 5.7 pcm

To tune off the open loop or o2 sensors until the car is in drive??


Hope this makes sense
My cam so far but once op loop kicks in car idles as if there was no cam
https://youtu.be/RQl8UAHngF8

[Homer]

Have you played with (increase torque) in the idle torque spark drive table? Your PCM has a park and drive table.
idle drive.JPG

[benjohns]

any idea on what to change them to ??

[benjohns]

no never touched them they are stock

[Homer]

any idea on what to change them to ??

Try increasing torque in the 50 to -50rpm range by 25%.

[benjohns]

my o2 sensors start working at 191c can anyone guess what temp the o2 temp would be in drive at 1300 rpm


my idea is to increase o2 temp so the close loop dosnt start working intill the car is in drive at about 1300 rpm

then as the car drops back to idle o2 cool down and go into open loop ??

[Crazypete59]

191 ? is for the ECT and only applies to the rear O2 sensors, without affecting the idle.
The starting idle is linked to the VE tables as long as the front O2 sensors are not in use. By disabling these sensors, or by increasing the closed loop enable coolant temp to 90 ? or more, the engine will run in open loop (on the VE tables) permanently. But you must be certain that the VE tables are correct to keep a drivable vehicle. And consumption will suffer.
I do not think it possible to program an O2 sensor activation threshold depending on the speed.

[Jay@HAP]

You cant command OL at idle like you can on the GM stuff, if that's what you are trying to do.

[B00STJUNKY]

You command OL at idle like you can on the GM stuff, if that's what you are trying to do.

Have you ever seen any settings in the Dodge calibrations to be able to do this? I haven't noticed it, but I also haven't really ever looked for it specifically.

[Jay@HAP]

I went back and fixed my post. I left out the word "can't" by mistake.

[curt@injected]

I went back and fixed my post. I left out the word "can't" by mistake.

Ya I don't believe it's possible. You can make the hellcats command a leaner afr at idle but none of the other mopars are capable.

[MITuning]

I don?t know why you would want that feature of running OL at idle .

[kenandjenn4551]

I don?t know why you would want that feature of running OL at idle .

Larger cams are not very narrowband friendly.

My cam is fairly modest (222/230 112.5 LSA) and it does much better at idle in OL (I run OL all the time now).

[curt@injected]

I don?t know why you would want that feature of running OL at idle .

Dat lope

[Jay@HAP]

Dat lope

This made my day....

[benjohns]

ok so what i ended up doing was extend the time from 12 sec to 40 sec i just would like to injoy my lobe for 40 sec before the close loop starts working and fattens up the fuel and makes it sound like a nannas car

close loop seems to kill the lobe sound on cams in 5.7 hemi

[benjohns]

i can try this but I can't find an explanation on what these settings do

[benjohns]

yer it sucks ass

[benjohns]

gotta love the lobe

[Homer]

any idea on what to change them to ??

Try increasing torque in the 50 to -50rpm range by 25%.

Have you tried this?