Not getting any boost control duty cycle?

[kim_gulle]

Hi all!

Need some help with testing my boost control setup.

I've installed the circuit for boost control that is available at Diyautotune here: http://www.diyautotune.com/images/modki ... ematic.png
Running the Extra029y4 code.

I am planning on running open loop control with only the duty targets controlling the boost and not the kpa targets.

But when i try to test the circuit with the jimtstim in Tunerstudio i can not seem to even get any duty cycle indication. I am using Output1/JS2 and have set up the DC table with some values ranging from 0 to 100 duty cycle.
But no matter what RPM or how much i turn up the tps, the Boost control duty cycle stays at 0. Have i missed something? What settings do i have to use to make it work?

Currently i have these values in Boost Control Parameters:

Solenoid PWM Rate: 39hz
Controller Update(ms) : 10
Proportional Gain: 69,8
Differential Gain : 2,0

Increase voltage = Increase boost

Switch boost target tables when... : Dont Switch

Closed loop kpa limit: 255

Typical ambient pressure: 101

Thanks.

[Matt Cramer]

[kim_gulle]

Oh sorry, here's the current MSQ.

[Matt Cramer]

Please also include a data log of testing on the Stim - I'd like to make sure no sensor reading is interfering with it somehow.

[kim_gulle]

Please also include a data log of testing on the Stim - I'd like to make sure no sensor reading is interfering with it somehow.

Here's a datalog of me running the jimstim. Hope you can detect something.

[jammy86]

Are you stimulating the MAP sensor with a syringe or something? Also how have you got the logic set of the boost controller to be active to increase boost or active to decrease boost?

[kim_gulle]

Are you stimulating the MAP sensor with a syringe or something? Also how have you got the logic set of the boost controller to be active to increase boost or active to decrease boost?

No i am not stimulating the Map. But that shouldn't be needed as the Duty Cycle is based upon TPS and RPM. The kpa table is not being used. I looked at this video: https://www.youtube.com/watch?v=_1aEQxaHnlI and that's exaclty how i want it to work, but it just won't show any duty cycle for me. I've tried both active to increase and active to decrease boost. But still no Duty Cycle.

[Matt Cramer]

Typical ambient pressure needs to be set at or below the actual ambient pressure - otherwise it will not turn on the boost output.