This is like my 6th jet and I have never had issues like this.

I got 1 1/2 flights on my new JL 1/5 L39 gen 2. With K180

Madden flight was great only used full power on take off the rest of the flight at 1/2 - 3/4 no issues

2nd flight after takeoff go to do full power low fly by and at the end it barely did the vertical, it felt like full power was 1/2 stick. Then flame out.
Got it down no issues, the UAT
http://www.dreamworksrc.com/catalog/High-Flow-Air-Trap

Was full and the Kingteck said max pump voltage reached

Went to drain the system and the UAT suck in on the round paper element and was putting air bubbles in the 5g fuel jug

so I think kinked 6 festo line from the tanks Y to the UAT so I pull it out from under the receiver mounting plate and run directly.

Then disconnected the line from the motor and ran it to my fuel jug and used the KT program box to test pump. At max fuel pump voltage I was getting a stream of air bubbles from UAT to pump and from tanks to UAT and UAT was sucked all the way in.
I clamped off the left the right tank to see if there was a different with no luck.

Also disconnected each vent line incase the vent line was two small
I used all brass adapters for the UAT from Dreamworks with metal wire twist ties in all connection.

Im lost. Is this a big motor thing were I need a composite UAT?