4 Port Boost Control Solenoid Frequency

[slow94formula]

I am having a problem getting my boost to hold steady. Started with 26.5hz where it would fluctuate 3-5 psi and worked my way down to 15.6 before it started to get worse again. The best setting was 19.5hz but it will still fluctuate 1-2 psi. This is in open loop. Any other settings I should try to adjust other than frequency?

[slow94formula]

Current settings here. Would it help to try mid solenoid frequency range? I see there is a 20hz option in there, but not sure if I should try it.

[nathaninwa]

A friend runs 11hz to get good control. He's learned the 4 port valves have heavier plungers and higher hz ranges doesn't allow it to move all the way

[slow94formula]

Thanks. I tried 11.1hz and didn't seem to make it better. For now I changed the MAP averaging lag factor to smooth it out. Maybe the MAP is just in a bad location.