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Chrisandtaba

Member

• May 27, 2020

• #1

Help - my landy starts an runs okay but after about 5 minutes i get air bubbles in the fuel line and it breaks down. I recently replaced the fuel pump and that's when the problems started. Have tried PTFE tape on union but no difference and have tried sleeving section of nylon pipe from chassis member mount to pump an again no luck. Please help i am desperate!

 

blue beasty

Leaks an prone to bits dropping off

• May 27, 2020

• #2

You most likely have a leak between the tank and pump. Because it's under negative pressure as the pump 'sucks' fuel leakage is minimal but air can be pulled in.

Inspect from pickup pipe all along fuel line or replace

 

wireman

Well-Known Member

• May 27, 2020

• #3

How much fuel is in the tank? It is not unknown for the fuel pick up pipe in the tank to corrode and draw air in when the fuel level drops below the hole.

 

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Colthebrummie

Well-Known Member

• May 27, 2020

• #4

You did attach the new pump correctly didn't you, it possible to get the operating lever the wrong side of the cam.

Col

 

wireman

Well-Known Member

• May 30, 2020

• #5

Chrisandtaba said:

Help - my landy starts an runs okay but after about 5 minutes i get air bubbles in the fuel line and it breaks down. I recently replaced the fuel pump and that's when the problems started. Have tried PTFE tape on union but no difference and have tried sleeving section of nylon pipe from chassis member mount to pump an again no luck. Please help i am desperate!

Click to expand...

Did you get to the bottom of this?

 

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Chrisandtaba

Member

• Jun 4, 2020

• #6

So new fuel pump arrived today and when i came to fit if i noticed the cast flange clashed with a bolt head so wasn't seating properly! Had to file it down to make it fit which makes me think the other one wasnt fitted properly either. I also found 3 gaskets when i took it off that someone else had fitted. Could explain the low flow rate but not sure about the bubbles. Battery flat now so can't check it . Was a britpart pump and now i have two!

 

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Chrisandtaba

Member

• Jun 4, 2020

• #7

wireman said:

How much fuel is in the tank? It is not unknown for the fuel pick up pipe in the tank to corrode and draw air in when the fuel level drops below the hole.

Click to expand...

Full tank tried that one

 

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Chrisandtaba

Member

• Jun 4, 2020

• #8

Colthebrummie said:

You did attach the new pump correctly didn't you, it possible to get the operating lever the wrong side of the cam.

Col

Click to expand...

Not sure how to attach incorrectly as cannot see. Fitted from the top and hooked top of follow in and then rotated downwards

 

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rob1miles

Well-Known Member

• Jun 4, 2020

• #9

Does it have a glass bowl?

 

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Chrisandtaba

Member

• Jun 5, 2020

• #10

Yes it does. Have started and run it 4 times now and seems to be okay. Fingers crossed this has sorted the issue. Will keep you posted. Thanks everyone for your help and advice