Hey everyone, I’m having an issue with my car jerking at over 4000 RPM. 911sc 1979
I decided to check the fuel system pressure. The control pressure, system pressure, and leak test all showed factory-spec values. However, I noticed something strange: when I closed the valve on the gauge to check system pressure, the pressure went up to 5 bar as it should. But when I opened the valve again to check control pressure, the pressure stayed at 5 bar and didn’t drop as expected.
Sometimes the pressure would go back down to normal, but other times it just got stuck at 5 bar. So clearly, something’s not right.
Where should I start looking to find the root of this problem?
Here’s a video where it’s all shown clearly:
http://youtu.be/2qVKN8Gk02M?si=8k7_uk7zEflI9wqF
Also there is bubbles in the fuel tank, is it okay? Video:
https://youtube.com/shorts/T8IoXqjbWKE?si=nKHJSfC-niXcvmJV