M-1009 with a fuel leak, air in fuel and some surging

[kentuckycucv]

Ok just did an electric fuel pump. I have air bubbles in my clear plastic tube coming out of my IP. It is sucking in air and stalling. I cant find any dripping fuel. Can the IP suck in air?

 

[kentuckycucv]

I just bypassed my fuel filter...still have air bubbles. Maybe its sucking in air back in the tank behind my new electric fuel pump? Maybe it is sucking in air on the line under the intake manifold? maybe it is sucking in air from the IP? I had a trail of fuel behind my truck when it died on the road but the next morning I cant get it to Leak. Any ideas???

 

[southdave]

I just bypassed my fuel filter...still have air bubbles. Maybe its sucking in air back in the tank behind my new electric fuel pump? Maybe it is sucking in air on the line under the intake manifold? maybe it is sucking in air from the IP? I had a trail of fuel behind my truck when it died on the road but the next morning I cant get it to Leak. Any ideas???

There is bunch of rubber lines on the system also it is 30yr old truck..

 

[kentuckycucv]

Does a failing IP suck in air?

 

[cpf240]

I suppose it could, perhaps through the throttle shaft bushings? I know they can leak fuel there...

 

[kentuckycucv]

I took off the manifold and replaced the fuel hose and ran a new fuel line to the tank...problem solved. No more air bubbles and seems like the IP is functioning. But now the fuel guage isn't working and my 2 wires are are connect to the sending unit.