Thank you all for the replies.
I sent an email to Gaspar and he like you guys agreed that it is a fuel problem and said to check my fuel lines.
last night when checking the fuel lines I noticed the fuel line between the fuel valve and the engine was totally empty, I'm not sure if it got drained during de-fueling, not likely, I run the pump to check the fuel flow, it looked good.
After finding that fuel line empty I was thinking that air may have been sucked in via the Festo shut off valve, with that in mind I refreshed the end of the fuel lines on both sides of the Festo valve and the Festo fitting by the engine by cutting them.
I will be going back to the flying field today to run the engine on the ground for at least 5 min then if all looks good, I will give it a flight.
Last edited by CARS II; 05-03-2019 at 09:47 AM.