Ducati S2R1000 - barely runs and runs rough

[Fitron]

Do you have experience with this pump? Not much info online and no website either.

No sir I do not. Just figured that for 30$ you can't really go wrong...if anything it will help diagnose your problem.

[csmutty]

I just bought a $50 fuel pump on Amazon. Went for a slightly higher quality one than the $30 pump. Works great.

[timmyho414]

I bought a cheap-30-50 pump on ebay or amazon, I can't remember and I can't find the info but I has been fine for 2-3 years now.

It looks like the same exact thing I pulled out of one of my cars. same size, same electrical connector, same fuel line hookup, same damn thing. They come with crap you don't need like that sock filter and maybe an electric connector but you just throw that stuff in the tool box for later projects.

oh yea, it may not clip into the stock sending unit. The stock pump was longer so I had to use a hose clamp to secure the pump. no big deal.

[timmyho414]

I just watched your video.

You'll have to look at you bike but you typically can't do a pressure on the return hose. You need to figure out where the pressure regulator is but it should go pump, filter, injectors pressure, regulator, tank. Wither that means the regulator is next to the injectors like my 01 monster, 01 748 and I'm pretty sure my 749 or in the tank I don't know. If you test after the regulator you will have very little if any pressure. The flow is still low(i was waiting to see it spray into that container and back out again) and I'd still get a pump.

[SwiftTone]

I just watched your video.

You'll have to look at you bike but you typically can't do a pressure on the return hose. You need to figure out where the pressure regulator is but it should go pump, filter, injectors pressure, regulator, tank. Wither that means the regulator is next to the injectors like my 01 monster, 01 748 and I'm pretty sure my 749 or in the tank I don't know. If you test after the regulator you will have very little if any pressure. The flow is still low(i was waiting to see it spray into that container and back out again) and I'd still get a pump.

The system is in the order you listed but the regulator is in the tank so the fuel goes through the regulator after the return hose.

Can I remove the fuel pump unit and test the flow with distilled water?

[timmyho414]

I wouldn't run water through it.

If the regulator is in the tank like you said and the hose in the tank are all okay like you said then your test was valid and the pump is bad.

Being that you replace the filter because of a running issue and everything else looked ok in there it sounds pretty solid that the pump was the root cause.

I'd put a pump in it and do your test again to verify you have pressure and recheck the flow. You should be all set.

[timmyho414]

you know the more I think about this you may want to T into the return line with the pressure gauge so the regulator is in the equation once you get the new pump in. Otherwise the pressure will/may show too high and may freak out the new pump.

[SwiftTone]

So….its running!



Took the tank back off and did a fuel pump flow test with the new Ducati filter and the old NAPA looking filter. Noticed that the Ducati filter flowed less water. Installed the old filter back on and was able to build pressure to 43psi after priming a few times. It fired up immediately! Went to NAPA and bought a 3032 Gold filter, installed it and same pressure characteristics of the old filter.



I can’t believe the culprit was the Ducati filter.



Admittedly, I did buy the new filter from eBay to save a few bucks, but from a highly rated seller. I would have never thought a new filter could be bad. Lesson learned.

Thanks all!

[myzx6]

It was probably thrown around during shipping so many times that the filter element turned into a solid mass of blockage.

[golden chicken]

[csmutty]

I wonder what about the filter caused that...

[Not Sure]

David, you should have just replaced the filter to begin with and saved yourself a bunch of trouble.

[gumby]

A test ride to VT is in order.

[cdovego]

glad it's sorted - good work!

[SwiftTone]

David, you should have just replaced the filter to begin with and saved yourself a bunch of trouble.

Who would have thought that a simple part like a fuel filter would be bad out of the box.

A test ride to VT is in order.

Canada. CANADA! You coming right?

glad it's sorted - good work!

Not quite yet. Stay tuned for the next episode...