Not starting! Mystery

[Azrider04]

Hi everyone,
Just picked up this beautiful ‘04 FJR1300 last week. No issues with it before.

It had some corrosion in the tank so I took it off and lined it with POR15, I also changed the fuel strainer on the pump with a generic one from autozone. And now it doesn’t start. It will run on starting fluid but without it it kind of sputters and won’t stay running. I have verified the pump is working and that I have fuel flow to the fuel rail.

I feel like it’s something obvious! Any help would be appreciated. Thanks

Here is a video of the issue:


Here is a video of it running before I touched anything:

 

[RossKean]

Are all four header pipes the same temperature (or at least close) while it is running badly. First thing I might look for is a plug wire that isn't making good contact. With the cruddy tank, there is a possibility that your fuel injectors got messed up.
Couple of things to think about anyway...

Good luck - and WELCOME.

 

[Azrider04]

I checked the header and all pipes were equally warm. I pulled the injectors and all of them are functioning.

Next thing I’ll try is to throw a fuel pressure gauge on there and see if the pump is creating enough pressure. That’s the only other thing I could imagine going bad.

 

[SkooterG]

Hopefully the POR15 didn't screw something up?

 

[waynevb]

Check the fuel pump is seating correctly. If the injector line doesn't get enough pressure, the bike will be hard to start and will stall unless you blip the throttle.

I had this problem after I replaced the fuel tank and a local bike shop identified the problem.

 

[SkooterG]

Check the fuel pump is seating correctly.

Can you provide more detail? I am having trouble picturing what you mean.

 

[waynevb]

Can you provide more detail? I am having trouble picturing what you mean.

When separating the pump housing body, there are several latching tabs that all have to be released at the same time.

The o-ring that seals where the fuel pump assembly mates to the tank. If the old one has been compressed for a long time it may not reseal.

 

[waynevb]

Can you provide more detail? I am having trouble picturing what you mean.

The attached photo shows the various seals (non-OEM). I don't have an original to reference. However, the one labelled sealing rubber should have an equivalent. When my bike had this problem, the local bike shop fixed it and they said that the pump wasn't seated correctly and the fuel pressure was too low.