bubbles in my fuel line

[loftuz]

Hi all

Another novice Nitro owner here

Had my hyper 7 pro out today, trying to run the engine in. killed 3 plugs so far.

I have noticed that there are little bubbles in my fuel line when the car is running? This cant be right? Can it?

What could be causing this? Ive replaced all of the old fuel line with new tubing, there are no leakes from what i can see?

Any help would be great?

[badger906]

one or two is somewhat normal, but a large number normally means youve an air leak, that will also indicate why your blowing plugs, as the engine is running more lean because of the added air in the mixture

[Ruhel]

I have also seen this if the engine is running really lean hot gasses from exhaust cause the fuel to bubble in the lines. But the first port of call would be to check the seal on the fuel tank.