2011 KTM 350 SXF FUEL PRESSURE ISSUE SOLVED… FUEL PRESSURE REGULATOR FAILURE.
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- Опубликовано: 7 апр 2022
- My KTM would not start so I did a little diagnostic work and found a bad fuel pressure regulator. I thought I would share with you my findings in hopes that it would help you.
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It did in fact fix it… I did not make a video but I did post a video of me wrecking it in the parking lot at work! Go check it out 🤣
Been a bit of a mission. So I was running lean at 35 psi changed the filter and fuel pump. Then I'm running 40 psi which is too low and still dumping the pressure. So pulled the regulator out of the back, when to start the bike and it's pissing fuel out of the regulator. So hopefully that's the last step to getting back to full power
Great info and very informative thank you Sir!
Usually have to replace the quantum pumps about every 2 seasons.
Great video thanks. I have a YBR125 not starting, some kinda fuel issue. I've replaced the pump/impeller and also cleaned injector, no difference. Beginning to think the only thing left to check is the regulator. That is built into the pump assembly .. haven't checked carefully enough but suspect I can't just replace the regulator, would have to replace whole pump assembly which is £££. Maybe its possible to bypass this reg in the pump assembly and install some external regulator in the line. Thanks for this its helpful to know about this stuff.
In my opinion, the service manual is invaluable. There are usually cheap PDF versions available online. I bought one for my KTM for $20. It’s saved on my laptop so, I’ll always have it. My point is, you will learn so much from seeing the manufacturers thoughts on the repair process.
As far as bypassing the regulator goes… I recommend knowing what your pump is capable of producing because that’s what you’ll get at the injector. That in turn will directly affect the amount of fuel added to your combustion chamber… if you don’t have the proper fuel air mixture, you won’t like the way she runs.
We call testing pump maximum pressure “dead heading” or “dead head” pressure. My pump is capable of more than 120PSI… which is almost 3 times more fuel than I need. But, she should at least run again if you can eliminate the regulator and get fuel pressure to the injector.
Good luck bud!
@@thenomadicmechanic6414 Thank you sir!
@@thenomadicmechanic6414 If I do bypass the reg in the pump assembly I would put an ebay one inline somewhere. A bit clumsy, but cheaper.
@@andrewgraham1017 I didn’t even think about that… that’s a good idea! If it looks stupid but it works… it ain’t stupid :)
@@thenomadicmechanic6414KTM manuals are on their site for free
What was the outcome