How-to Diagnose KTM, HQV Fuel Pump

slavensracing.com/shop/fuel-p...

[@mudpro200]

Thanks Jeff for all the info you take time to do for us home mechanics. The info is priceless for me!

[@frazzle657]

I suspect my fuel pump on my exc is bad. Ive just changed the fuel filter and it was well overdue. Black fuel pissed out of it. I could have bought the fuel pump for under 50 but i bought a pressure tester for 17 first as at least then i have the tool, especially if its not the issue

[@dough3208]

Jeff i enjoy your videos i am testing my sherco sef-f pump and using this vid for reference , I get 49 psi (bike not started) but it doesn't hold the pressure for over a few seconds should i be checking for split fuel lines /bad check valves? there's very little sherco info out there . thanks.

[@slaverace1]

Does your bike have an issue or are you checking the pressure for no reason?

[@dough3208]

@@slaverace1 Sorry i just noticed your reply , I was checking the Fuel Pressure because my bike wont start , the sherco seems to be getting fuel to the cyl and a fat spark it seems as if it could be flooding because it will sputter with a small amount of carb spray sprayed into the intake (injector power disconnected). I have properly checked so many things. Stator , Timing , flywheel woodruff key , wiring , tps , injector tried new batt, new spark plug etc.. I was told by a mechanic that the fuel pressure should be 3 bar and doesnt need to hold the pressure but im still not sure. I have a Leak down tester as i suspect possible valve leakage if that passes ill be baffled .

[@adambatchelder4121]

I took it a step farther and built one with a T and both fittings so I can run the gauge in line and with it running.

[@jakobcrawford2753]

That's a good idea :)

[@andybj4091]

I've heard the stock plastic in tank fuel filter can crack causing a loss in pressure. Have you seen this? Also, how common do these pumps fail? I have a 2018 500 and hopefully don't want to have to worry about it. Thanks.

[@slaverace1]

Yes, I had a cracked filter on one of my bikes.

[@andybj4091]

@@slaverace1 Thanks Jeff, I got a metal in-tank filter to replace the junk OEM one to prevent this issue. How often do these fuel pumps fail? Is it a common problem? Thanks

[@halfbit]

Is this a common issue with the TPI? If the pressure is low what is the symptom and what potential damage that can occur?

[@slaverace1]

If your bike starts hard or runs poorly, this is the first test you should do. Low pressure makes the fueling lean.

[@jakemaas7780]

My fuel pressure jumped up to 50 during cranking but quickly dropped down close to 5-10 after I stopped cranking it. It didn't hold like it does in your video. Does this indicate a cracked in-tank fuel filter?

[@slaverace1]

It needs to maintain pressure. Dig deeper.

[@jakemaas7780]

Replaced the fuel filter, still wouldn't hold pressure. Replaced the fuel pressure regulator and it fixed the issue. The bike starts and runs like normal again.

[@01plumberman]

Do you recommend periodically checking this?

[@slaverace1]

No. If your bike runs well, ride it.

[@dazaladz]

How do you check if the oil pump is working before going for a ride? Is it just plugging the thing in to prime it?

[@slaverace1]

You can't easily check it. Chill and ride.

[@dazaladz]

That’s what I’ve been doing. Would you recommend priming it before a ride tho?

[@slaverace1]

No.

[@stacksmasher]

Jeff Slavens tell that to the guys with blown engines after 30 hours!

[@slaverace1]

@@stacksmasher SS, the majority of the seizures I've seen have been from cold seizures and lean seizures. I have yet to see an oil pump issue.

[@ityat]

Can you link to the product in your shop ?

[@slaverace1]

slavensracing.com/shop/fuel-pressure-gauge-for-ktm-husaberg-hqv-beta-by-slavens-racing/

[@rajkirannatarajan9276]

Even before disconnecting the fuel line from the rail, it’s good to have glasses on and gloves so gas doesn’t get on your hands.

[@mobgma]

lol did you run the fuel pump dry or was it pumping gas?

[@slaverace1]

The test is for FUEL pressure, not air pressure.

[@mobgma]

@@slaverace1 I figured I would have seen some gas drip out. Didnt see any so thought that is what you were doing.

[@RH-hb1kc]

I’ve got a 2019 300 tpi, after 5.2hrs the fuel pump gave up the ghost and diagnosed as a “earth issues” 🤬$1000 to replace and no support from KTM On part replacements ..

[@slaverace1]

We sell pumps for $79.95 slavensracing.com/shop/fuel-pump-ktm-husaberg-husqvarna-ca-cycleworks/ and it takes less than an hour to install. Your dealer is a crook.

[@RH-hb1kc]

@@slaverace1 you guys ship to Australia ?

[@slaverace1]

@@RH-hb1kc Yes . Every day.