Is it possible, High Idle Modification using 0411pcm
Is it possible, High Idle Modification using 0411pcm
Is it possible to have a high idle modification done using an unused input for the 0411 pcm?
Or maybe using the LS1 Boost OS? viewtopic.php?f=42&t=7482
Or maybe using the LS1 Boost OS? viewtopic.php?f=42&t=7482
Mostly interested in 0411 pcm on 4.3v6 with eventual plans for forced induction.
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- cars: 1970 Chevy El Camino with an LM7 modern GM engine.
2013 Chevrolet SS Camaro
Re: Is it possible, High Idle Modification using 0411pcm
How high of an idle RPM do you wish to go? As you go higher, you will also need to also give it more air. I've gone as high as 800 RPM on both an 0896 and a 0411 PCM with little difficulty - up from the stock RPM of 550 - but my leg got a bit of a workout holding the brake pedal at that RPM.
So, how high is "high"?
Rick
So, how high is "high"?
Rick
Re: Is it possible, High Idle Modification using 0411pcm
Is that a limit of the IAC valve?
I would like it to be adjustable up to about 1100rpm.
I would like it to be adjustable up to about 1100rpm.
Mostly interested in 0411 pcm on 4.3v6 with eventual plans for forced induction.
Re: Is it possible, High Idle Modification using 0411pcm
It's more like a PTO(Power Take Off) mode and is available mode in many GM controllers. I have not researched in the later controllers but it was for external water pumps as well as higher output from the alternator so they could drive external welders in the field.
Re: Is it possible, High Idle Modification using 0411pcm
I see that some of the trucks have:
Blue Connector
pin 22 PTO Switch Enable Signal
pin 52 PTO Status Signal
pin 78 PTO Engaged Signal
On the Express and Astro it looks like none of those are populated/used.
Blue Connector
pin 22 PTO Switch Enable Signal
pin 52 PTO Status Signal
pin 78 PTO Engaged Signal
On the Express and Astro it looks like none of those are populated/used.
Mostly interested in 0411 pcm on 4.3v6 with eventual plans for forced induction.
Re: Is it possible, High Idle Modification using 0411pcm
Yes, PTO is what your looking for. It was on some pickups and Kodiaks. I believe that it used the cruise control switches.
Re: Is it possible, High Idle Modification using 0411pcm
Please tell us more about your scenario.
When I was struggling with return-to-idle tuning, I set the idle to be 1200 RPM when AC was on (normally 750 RPM). So when I was out tinkering with idle settings, if I made a change that didn't work out, I would just turn on AC to band-aid the problem. It was a little weird but at least the engine wouldn't sputter and die at random intersections while I drove back home for another reflash.
When I was struggling with return-to-idle tuning, I set the idle to be 1200 RPM when AC was on (normally 750 RPM). So when I was out tinkering with idle settings, if I made a change that didn't work out, I would just turn on AC to band-aid the problem. It was a little weird but at least the engine wouldn't sputter and die at random intersections while I drove back home for another reflash.
Please don't PM me with technical questions - start a thread instead, and send me a link to it. That way I can answer in public, and help other people who have the same question. Thanks!
Re: Is it possible, High Idle Modification using 0411pcm
That is a great idea while working on tunes, TY!
I want to increase the idle for faster charging a battery bank.
I want to increase the idle for faster charging a battery bank.
Mostly interested in 0411 pcm on 4.3v6 with eventual plans for forced induction.
Re: Is it possible, High Idle Modification using 0411pcm
That sounds very similar to what the Power To Off mode was for.
I don't know whether any 411/P01 operating systems support it, but PTO is definitely a feature in the 12587603 OS for the P59 PCM.
I don't know whether any 411/P01 operating systems support it, but PTO is definitely a feature in the 12587603 OS for the P59 PCM.
Please don't PM me with technical questions - start a thread instead, and send me a link to it. That way I can answer in public, and help other people who have the same question. Thanks!
Re: Is it possible, High Idle Modification using 0411pcm
I'm pretty sure that the code for the PTO is in each OS since there is a place for the PTO option in the vehicle platform table under the system segment. I do know that there are quite a few parameters for the PTO under the engine segment. If you are starting with an OS which didn't have the PTO enabled, those parameters might be zeroed out. You would just have to copy over that section of code from a truck that had PTO enabled.