14 don’t start

[sltriquell]

Good evening, first of all, sorry if I'm not following the proper protocol — I'm new to the forum. I've been reading it for a long time, and it has helped me technically with my 14 K6.

Now I've reached a point where I can't find an apparent solution in the forum.

My 14 decided to stop the other day while riding. It started misfiring with a noise similar to running on 3 cylinders. No error codes are showing. The bike tries to start — it seems like it almost does in the first few cycles — but it won't start.

I took it home and, even though I could see spark on the spark plugs, I read that it might not be of sufficient quality, so I changed the coils for new ones — but the issue persists.

I did a compression test (just in case), and the results are all above the manual's minimum and very consistent across cylinders.

The fuel pump starts properly and delivers a good flow, but I don't have the tools to check the pressure.

Any idea what it could be? Which direction should I take?

So far, I think it's a fuel issue (since there's air and spark...), as if the injectors aren't opening. Any suggestions on how to check that? (That's just an idea — but please, any theory is welcome.)

Thank you very much to all!

[gsxbarmy]

When you say the fuel pump delivers a good flow - what exactly are you checking for this.

I'm just wondering whether your fuel filter / tea bag is clogged up. When you turn the bike over are the plugs getting wet - i.e. is fuel getting through?

May be worth just checking that everything there is clear https://gsx1400owners.org/forum/index.php?topic=430.0

[grog]

Pressure check required.A spray of aerostart in air box will confirm a fuel issue but not the reason. Stopped while riding, pressure regulator mightve come loose on pump housing🤷

[KiwiCol]

My thoughts as well Grog, reckon pressure regulator clip has come off.

Ask @Snapey about what the symptoms are for that situation, he had that exact thing happen to him ages ago.

[Eric GSX1400K3]

Going through similar here, can confirm my pressure reg was firmly in place, had a dodgy electrical connection, but that still hadn't fixed it. Also runs on 2 or 3 cylinders only.

[gsxbarmy]

Actually pressure regulator clip is a good call.

Check/how to fix here https://gsx1400owners.org/forum/index.php?topic=1610.0

[sltriquell]

Solved! Thank you very much for all the comments and contributions from the whole community.
Obviously, you were right. While I was waiting for the fuel pressure gauge to arrive, I took the pump apart. As soon as I removed it, I saw that the bracket had come off and the pressure regulator was out of place. So, indeed, the correct pressure wasn't being reached.
I reassembled everything properly, and it started up on the first try.

I have to admit I feel a bit embarrassed for having done so many tests without taking the pump apart earlier...

Thank you very much!

[grog]

Well done Mate👍Hope you wired it on

[KiwiCol]

All good mate, glad it's sorted for ya.

[gsxbarmy]

Solved! Thank you very much for all the comments and contributions from the whole community.
Obviously, you were right. While I was waiting for the fuel pressure gauge to arrive, I took the pump apart. As soon as I removed it, I saw that the bracket had come off and the pressure regulator was out of place. So, indeed, the correct pressure wasn't being reached.
I reassembled everything properly, and it started up on the first try.

I have to admit I feel a bit embarrassed for having done so many tests without taking the pump apart earlier...

Thank you very much!

Its what we're here for - glad its all sorted 

[GSXKING]

I'm always gladdened to see this forum helping others with issues. Usually ones they've experienced themselves.
I think I'm very lucky 🍀 I've not experienced too many issues to date "touch wood" hand to forehead lol 😂
I'm not mechanically minded so if there's anything other than oil and filters it's straight to Stu @ Rising Sun in Capalaba 🥇🥇🥇

[Kiwifruit]

Agree Chris, thumbs up to the forum, good people passing on their knowledge.
Great result