08 k9 efi starts buts cuts off in about 3 seconds

[stitches]

After letting my 2008 k9 efi bike set up in my garage for about a year I decided to get it going. I put in a new battery and drained as much gas as I could using a fuel line with bubble from one of my boats. It got most of it out and I added a little fresh gas. It fired right up and went on a couple of short rides with it . On my last ride I stopped and put gas in it. I only got about 2 miles from the station when it cut off. I’m not sure if it stirred up some sediment from the tank when I filled it up or not. Every time I hit the starter it cranks right up but shuts right down. Has anyone else had this issue? I am going to drain the tank fully this time and see if it helps . Could there be a sensor telling the bike to shut down?
thanks in advance for any help.

 

[Jersey Big Mike]

After letting my 2008 k9 efi bike set up in my garage for about a year I decided to get it going. I put in a new battery and drained as much gas as I could using a fuel line with bubble from one of my boats. It got most of it out and I added a little fresh gas. It fired right up and went on a couple of short rides with it . On my last ride I stopped and put gas in it. I only got about 2 miles from the station when it cut off. I’m not sure if it stirred up some sediment from the tank when I filled it up or not. Every time I hit the starter it cranks right up but shuts right down. Has anyone else had this issue? I am going to drain the tank fully this time and see if it helps . Could there be a sensor telling the bike to shut down?
thanks in advance for any help.

Sounds like the fuel pump might not be running, pressurizes starts, no more pressure and stop.
Might also be crank sensor on bike, they go bad from time to time.
Claning/checking the tank and filter would be a good first start.

 

[stitches]

Any way to test the fuel pump? I hear it cycle on and off as it should before it starts. I have removed and inspected the crank sensor in the past but that’s it. Any ideas on how to test it would be appreciated. Thanks

 

[Jwooky]

To test the fuel pump put a fuel pressure gage on the schrader valve under the tank. Should be 58 psi.

You only get a 2 sec prime at key on.

To keep it running you need to engage it through protune or you can jump the EFI relay

 

[stitches]

It’s just hard to believe the fuel pump would go out with only 8000 miles on the bike . So what you are saying is that even though it works at start up it could potentially stop working after that

 

[pknowles]

It’s just hard to believe the fuel pump would go out with only 8000 miles on the bike . So what you are saying is that even though it works at start up it could potentially stop working after that

8000 miles but 14 years old. The filter in the tank may be clogging up.

 

[TreeGuru]

Check your venting on the gas cap. Remove gas cap and try to blow threw it. If you can blow air threw it, it's working if not your bike maybe vapor lock. If your gas cap has the small white octogon shaped plastic on the bottom unscrew it off and put the gas cap back on and take a ride. Not all gas caps have this small white octogon shaped part. It makes the gas cap operate like a double check valve system I think.

 

[stitches]

8000 miles but 14 years old. The filter in the tank may be clogging up.

I felt like it could be a clogged filter. Anyone ever replaced one inside the tank? I was not sure there was one in there and not sure how to remove it. I removed the tank last night and thought I could pour the gas out of the top of the tank and was surprised when nothing came out. I guess I have to remove the small plug under the bottom of the rear of the tank correct.
Thanks for the response guys. I really would like to get her going again.

 

[TreeGuru]

When I bought mine the inside of my tank wasn't that bad, I removed and replaced the pet cock, flushed the tank for loose debri at the same time and replaced my gas cap. It solved my problem.

 

[Jwooky]

I felt like it could be a clogged filter. Anyone ever replaced one inside the tank? I was not sure there was one in there and not sure how to remove it. I removed the tank last night and thought I could pour the gas out of the top of the tank and was surprised when nothing came out. I guess I have to remove the small plug under the bottom of the rear of the tank correct.
Thanks for the response guys. I really would like to get her going again.

I’ve changed my filter several times.

Easier on a K9 since it’s attached to the access plate. You have to remove the tank, then the access plate. I drain the tank using the cross over tubes, but you should be able to pour out too.

 

[stitches]

I’ve changed my filter several times.

Easier on a K9 since it’s attached to the access plate. You have to remove the tank, then the access plate. I drain the tank using the cross over tubes, but you should be able to pour out too.

View attachment 106247

Thanks for the info and the pic. I hope it’s just a clogged filter

 

[Justin]

I also have a 2008 K9 efi...been giving me the blues for about a month. It would start and almost immediately kill. Then sometimes start and run. I was getting back firing thru the intake. I changed the fuel pump and filter. Fired right up !~ So far so good. ( fingers crossed )

 

[Sven]

Fuel, spark, compression. Lettuce eliminate each one as per:
Comp - Fires off so not it.
Spark - Keeps lighting off the bike so can't point to this.
Fuel - Has fuel but being FI it takes pressure behind the injector to work:
a. Can send fuel out the injectors, so it's clean and again, not here.
b. Gas cap - Will not shut the bike off at startup then shut off within seconds? Forget that.
c. Fuel line - Sends gas to injectors as if a collapsed or kinked line? Not likely.
d. Fuel pump - Is the last part of who is the problem in the fuel loop. Where the pre-screen is holding the big stuff back, but that cartridge is so fine a filter, one piece of red steel will cut and tear up any moving parts, to close the many holes in the exit side of the injector.

Sounds like a fuel pump than a crank sensor. Crank sensor is shot if it can't throw the spark. Crank sensor is a tiny AC generator. Makes its own power when the crank spins. Heat is the killer of electrical components and is not hot enough to fail that soon at startup.

 

[Mikeinjersey]

Thanks for the info and the pic. I hope it’s just a clogged filter

If it turns out after you have eliminated the pump and filter the problem still remains give this test to your crank sensor. Keep in mind it could test good but when it heats up it could still fail. Sometimes it just needs to be replaced when the failure is intermittent like yours to eliminate it as a cause for the engine dying.
https://www.dropbox.com/s/mt6qnv2ez7tcm31/basic-troubleshooting.pdf?dl=0

 

[stitches]

I just got a new filter and fuel pump. Going to install them and hopefully this will get it back going. I just have to try and find a large circle pinch clamp to secure the pump to the plate.

 

[stitches]

Doing a little work on it tonight. Replacing the fuel pressure regulator while I was in it and I noticed what looks like black caulk under it. I left it on there and put my new regulator on but now it will spin slightly. I assume it is some type of sealer and needs to be scraped off and replaced . Has anyone replaced the regulator and ran in to this? Is it a gasket making material or what? Any help would be appreciated. I don’t want to replace all these parts and screw up the install

 

[stitches]

Now that I think about it more I guess it could be O-rings that have looks like melted on there. I just wonder why the new one I purchased did not come with the O-rings

 

[Mikeinjersey]

Now that I think about it more I guess it could be O-rings that have looks like melted on there. I just wonder why the new one I purchased did not come with the O-rings

This is the service manual for 08. Chapter 7 has a the complete breakdown of the pump parts.

Dropbox

www.dropbox.com

 

[pknowles]

This is the regulator from my 09 service Manuel. Hope it helps.

 

[Sven]

Now that I think about it more I guess it could be O-rings that have looks like melted on there.

Now that you mention o-ring deterioration, might the rubber material used, be the pressure loss thru the weak ring seal? The steps being, it has pressure to start [clue here] the bike starts and that says pressure, but [clue is flawed] because if the loss thru the rings still starts the bike, that says the pump never shuts off due to pressure loss till it meets the pressure and stops. But the demand needed is the percentage loss of how many pounds thru the [rings are sealing] questionable pressure being it immediately starts then stops.

Kind of catch why I walk it till it makes 'questionable' sense of the o-ring vs pressure? New pump, new o-rings knows for sure.