YM2210 injectors, fuel pump, problem??

[thepumpguysc]

I just watched the vid.. THAT shouldn't be there..

 

[winston1]

Just the one cylinder with bubbles? I remember reading a thread recently where someone had loose delivery valve holder. Probably not your problem but easy to check. With all you have done it sure leads to something about the pump.

 

[Fire260]

I just watched the vid.. THAT shouldn't be there..

Thats my thought.

 

[Fire260]

Just the one cylinder with bubbles? I remember reading a thread recently where someone had loose delivery valve holder. Probably not your problem but easy to check. With all you have done it sure leads to something about the pump.

It is with both, when it comes to me, it wont be that easy, we all know that

 

[atsah]

So I did a little test tonight, I didn稚 have much time, the fuel line looks basically bubble free now with the cap loose but I知 still getting the bubbles in my fuel at the injectors. I apologize for the shaky video . What do you guys think?
Yanmar 2210 2T90 Air in fuel - YouTube

Nope that's not good.. Have you checked all clamps and hoses in the system? Something is letting air into the system somewhere..

 

[Fire260]

Nope that's not good.. Have you checked all clamps and hoses in the system? Something is letting air into the system somewhere..

Yes, i did take the fuel cap off and it seem to stop the air bubbles in the supply line to the pump. but im still making foam.:confused2:

 

[atsah]

Yes, i did take the fuel cap off and it seem to stop the air bubbles in the supply line to the pump. but im still making foam.:confused2:

Sounds like a vacuum problem causing the supply line air bubbles, so if unscrewing the cap eliminated air in the line to the pump I would suspect an o-ring or seal in the pump with a leak, there isn't much else it could be, you have the lines off of the pump to the injectors and the pump itself and that's it correct?..

 

[Fire260]

Sounds like a vacuum problem causing the supply line air bubbles, so if unscrewing the cap eliminated air in the line to the pump I would suspect an o-ring or seal in the pump with a leak, there isn't much else it could be, you have the lines off of the pump to the injectors and the pump itself and that's it correct?..

I just cracked the line at the injector for the video, every thing else is hooked up.

 

[atsah]

I just cracked the line at the injector for the video, every thing else is hooked up.

So you have a supply line, a return line from the injectors back to the tank, no fuel pump, an injector pump and the injector lines to the injectors correct? I'm trying to picture this gravity fed system..

 

[Fire260]

So you have a supply line, a return line from the injectors back to the tank, no fuel pump, an injector pump and the injector lines to the injectors correct? I'm trying to picture this gravity fed system..

That is correct.