Air in Fuel System FL2

Scaz93 · Sep 21, 2023

Hi everyone
My 2013 FL2 is a bit spluttery on start up in the morning, but not at any other time of day.
I've checked the fuel line first thing in the morning upon start up and it has air bubbles floating through.
Much worse when cold, as expected with the fuel being thicker.
Any ideas on a simple fix?
Thanks very much!

Nodge68 · Sep 21, 2023

Air in the fuel line is generally a sign that the O rings in the quick connectors aren't sealing tight.
The only way I've found to get the correct O rings is to get new quick contacts and pinch the O rings out of them. Not ideal, but it's worked for me. Oh and sometimes aftermarket fuel filters allow air in through the factory connector, as well as hot running issues very hot. The only way to eliminate filter issues is to only use Genuine LR filters, or OE filters marked with the Purflux name.

The other cause of spluttering when left overnight is an injector draining down. This is sometimes accompanied by smoke from the exhaust when it fires up.

Scaz93 · Sep 21, 2023

Nodge68 said:
Air in the fuel line is generally a sign that the O rings in the quick connectors aren't sealing tight.
The only way I've found to get the correct O rings is to get new quick contacts and pinch the O rings out of them. Not ideal, but it's worked for me. Oh and sometimes aftermarket fuel filters allow air in through the factory connector, as well as hot running issues very hot. The only way to eliminate filter issues is to only use Genuine LR filters, or OE filters marked with the Purflux name.

The other cause of spluttering when left overnight is an injector draining down. This is sometimes accompanied by smoke from the exhaust when it fires up.

Thanks Nodge, Ive got a genuine LR filter on there, so will try the O-Rings.
How would I go about sorting the injector drain back, as that sounds possible

Nodge68 · Sep 22, 2023

Scaz93 said:
Thanks Nodge, Ive got a genuine LR filter on there, so will try the O-Rings.
How would I go about sorting the injector drain back, as that sounds possible

Finding a leaking injector isn't easy. I've one that is misbehaving randomly on mine, but I've yet to identify which one it is.

Air in Fuel System FL2

Scaz93

Member

Nodge68

Well-Known Member

Scaz93

Member

Nodge68

Well-Known Member

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