My 81 rabbit with AAZ transplant engine and a newer style fuel filter with a CAT filter (seen on tdi engines). I recently started to have an issue where the fuel seems to leak down and get air into the filter area. I have a hand primer bulb online before the filter and once I pump it things stay fine until it sits again for a couple days. If I run without repumping the hand bulb it barely runs and will die and not have power. Once I pump all is fine. Where do I start? No external leaks at all.
Sent from my SM-G900V using Tapatalk
How is the gasket on the return line going into the filter? Can get some leaks there when they get old.
I did just replace it but it looked good. I decided to change the the filter and orings.
Sent from my SM-G900V using Tapatalk
Clear line coming from the pump will let you know if air is leaking in around the small injector lines.
I see air at the filter output. Any air at the front of the pump?
On the bottom of the banjo, I see 2 copper washers stacked against each other. That is not normal practice and could be where air is getting in.
I also just noticed the hose coming from the hand pump to the filter is a larger diameter then the filter nipple. That might be your issue? Maybe try running it without the hand pump and a proper diameter hose? or try replacing the hoses coming from the hard lines under the car to the filter?