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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: ed3541 on February 03, 2017, 11:48:28 AM

Title: Fuel flow blockage - Clean tank, new fuel pump and cleaned injectors
Post by: ed3541 on February 03, 2017, 11:48:28 AM

I have a '95 K75 that has a fuel blockage. I cleaned the tank, changed the fuel pump (it works) and sonic-cleaned the injectors. Fuel line from pump to Fuel rail is clear. Fuel pump pumps a strong stream but no fuel is getting to rail. Could pressure regulator be stuck? Anyone have this problem? - I could use some help.
Love this bike and need it fixed cause it's the coolest running bike for South Florida. Right now - riding a Triumph Speed Triple but it'll be too hot for the summer.

thanx,
Ed

Title: Re: Fuel flow blockage - Clean tank, new fuel pump and cleaned injectors
Post by: Laitch on February 03, 2017, 12:04:06 PM

Quote from: ed3541 on February 03, 2017, 11:48:28 AM

Fuel line from pump to Fuel rail is clear.

Does that mean it doesn't have a blockage in it or that it doesn't have any fuel in it?

Title: Re: Fuel flow blockage - Clean tank, new fuel pump and cleaned injectors
Post by: billday on February 03, 2017, 12:09:54 PM

You don't mention the fuel filter. Have you replaced it? Is it oriented correctly?

Title: Re: Fuel flow blockage - Clean tank, new fuel pump and cleaned injectors
Post by: The Mighty Gryphon on February 03, 2017, 01:56:16 PM

Is there fuel coming out of the hose that feeds the rail?  Do you have the fuel lines connected to the correct spigots on the tank? 

+1 on the filter.

Title: Re: Fuel flow blockage - Clean tank, new fuel pump and cleaned injectors
Post by: ed3541 on February 04, 2017, 08:14:39 AM

Thanx for the help. I got it running. I removed the return line at the tank, pressed the starter button and got a strong stream of fuel. The engine ran and kept running when I reconnected the fuel line. So I think it was some kind of air-lock in the return line. Bike is purring again and running better than before because of new fuel pump and clean injectors.

Title: Re: Fuel flow blockage - Clean tank, new fuel pump and cleaned injectors
Post by: Laitch on February 04, 2017, 08:20:26 AM

Thanks for the update, ed!

Title: Re: Fuel flow blockage - Clean tank, new fuel pump and cleaned injectors
Post by: The Mighty Gryphon on February 04, 2017, 10:32:37 AM

Quote from: Laitch on February 04, 2017, 08:20:26 AM

Thanks for the update, ed!

+1.  Have you posted an photos of your brick?  Looks like a nice one from your avatar.  We always like a little K-bike porn around here.