Grzegorz M

So below 4500 rpm valve should be activate (sucking air) and over 4500 rpm should close this valve to open intake?

Hi once again. I have a question about this vacuum valve. Is this possible during stop to check if its works or not? What are conditions to activate this valve?

As I know I have custom made exaust with flap controller through pilot. Do You actually blocked this flap pipe with vacuum cap? After this flap will be fully open all time? Is this safe?

Yes it does. After higher rev engine sound different. I have two valves, everywhere where i found i saw just one, strange. I will record video with sound next time. BTW, somewhere here in forum i read that it is not recomended to disconect electrical plug from that valves, is this correct?

Hi guys, i'm fresh owner of RCF. Meybe this is not a problem or it is. From 3 weeks I can hear under the hood that there is a strange noise when car is shot down. It seems this is one of two vacuum valve. It sound like "click" many times. What is going on. There are two thin tubes connect to it. One is strange guided because it's going at the back of the battery and goes strigh down and then somehwere else. Im not sure if its bended somewhere. It is normal that this valve is working even when car is not runnig?