air leak problem.

[Jon]

I'm having an air leak problem with this picco in my jammin x1.
i have leak tested the tank and fuel lines and they hold pressure.
i sealed the neck of the carb along with the hsn. all needle orings are tight. but yet I'm still getting air bubbles in the fuel line causing the engine to get crazy lean.
also this happens after the motor warms up a little and if i pull the throttle it runs fine but once off the air bubbles start getting to the carb.

freddy mention maybe the exhaust line isn't making enough tank pressure but I'm not sure what it is.

i made 2 vids showing what I'm talking about. please watch both of them.
thanks in advance.

http://s550.photobucket.com/albums/ii427/badasssavage/?action=view&current=MOV01289.flv

http://s550.photobucket.com/albums/ii427/badasssavage/?action=view&current=MOV01291.flv

 

[frddyj]

freddy mention maybe the exhaust line isn't making enough tank pressure but I'm not sure what it is.

that was just a guess btw... caz of the air bubbles.

if you get to frustrated, i'll give you $100 shipped.

 

[f1n3sse]

I had somewhat the same issue today, When I grabbed more than 1/4 throttle it would just cut out, I was looking around and noticed that there were air bubbles in my feed tube, all I did was cut a new piece from tank to carb and that fixed my problem. I know you said you tested them for pressure but it can't hurt to replace .15$ worth of fuel tube.

 

[Jon]

man you so lucky it was that, ive tryed 3 sets of new tubing, i even made a trip the the lhs for 3 ft of new tube and replaced it 2 times
still does it 🙁

 

[Mickey]

bad do you have a bad tank as in a crack in the pickup inside the tank? elevate the front of the truck to keep the pickup completely submerged in the fuel and see if that helps