Dreaded Air in fuel line....

Injector cups not gunna put air in davco filter.. injector cups only leak fuel into coolant or into cylinders...period.

 

Only place your gunna find air bubbles from injector cups is in return line or in tank.

 

Are you a mechanic or driver? I am a driver and have seen bubbles in the davco because of cups. It doesn't happen everytime but it does happen.

 

Rudy. Before posting research why, with Volvo D13 engines, injector cups are the reason that air is entering the fuel stream. If you can't find any information, here or google, post back and someone will explain why.

 

Driver and mechanic..... Did u replace cups your self or you going off what mechanic told you?

 

I seen it. No mechanic just my own 2 eyes.

 

Feed line is orginal. Never been replaced. I saw the bubbles when the truck had the copper cups

 

Its impossible for bubbles to get in davco filter from bad cups. The only possible way for air to get into davco is from a leak in supply line.