Desired idle goes up on it's own p59 3bar OS

[MoBoost]

I have seen this once before and didn't have an answer.
Desired idle doesn't match the table.
On start up 150rpm is added.
Over next 20 seconds it goes to desired idle.
Then at 55 seconds another 150rpm is added over next 15 seconds.

What adds to desired idle RPM?

Tune and log attached.

idle.hpl
005_STR.hpt

[kevin87turbot]

Very likely has a vacuum leak. If you try to control the Idle rpm with your scanner, does it follow the commanded idle speed?

[MoBoost]

Actual idle follows Desired Idle RPM. I have full control over the idle with the Scanner Controls.

The Desired Idle RPM table is set to 700.
The car starts - I can watch Desired Idle RPM in the scanner go to 700 (so does the actual idle).
50 seconds after starting "something" raises the Desired Idle RPM to 850 (so does the actual idle).
I can't figure what that "something" is.

It seems no matter what I set Desired Idle RPM table to - 150rpm is added.

[MoBoost]

Anyone?

[Ben Charles]

I’ve seen this before 2x... ended up doing a write entire with another OS and fixed it

[kevin87turbot]

I’ve seen this before 2x... ended up doing a write entire with another OS and fixed it

I'm clicking the Like button.

[luisdavid11]

I’ve seen this before 2x... ended up doing a write entire with another OS and fixed it

this

[Ben Charles]

I’m wanting to say it was Truck OS both times and literally happen around the 45 second to minute mark

[MoBoost]

Just ran into another one doing the same.
02 Silverado, 1 BAR OS - idle runs off.

Switched to Camaro OS. Fixed!

Thanks Ben!!!

[MoBoost]

Working on 06 Silverado. Idle runs off for no reason in both original and SD OS's. DBW F-body OS is not an option
Going to try to flash everything back to stock with GM SDS.

Why is this a thing?

[TINKRD]

I have an 04 Tahoe P59 OS with 3 bar upgrade and mine is doing the same thing. Desired idle going up 100 rpms and I can't figure out why.

[reubone]

Tables we cannot see possibly?

[Ben Charles]

Tables we cannot see possibly?

That would be my guess… but something that can normally be modded I believe is trigging it… not 100% sure what???
Always just change OS and works fine

[tana99ss]

That would be my guess… but something that can normally be modded I believe is trigging it… not 100% sure what???
Always just change OS and works fine

when you do this, do you have to buy credits again?

[Ben Charles]

when you do this, do you have to buy credits again?

Yes…

[TINKRD]

That would be my guess… but something that can normally be modded I believe is trigging it… not 100% sure what???
Always just change OS and works fine

Wouldn't happen to have a stock tune OS that's fixed it in the past? I don't want to pay for credits if I chose an OS that doesn't work.

[Ben Charles]

I don’t recall which OS it is, but it’s a truck OS ‘em that does it, Fbody never had a problem

[TINKRD]

Appreciate the info!

[eastcoastcobras]

@moboost, any solution to this? I am having exact same issue.