Fuel pump or Regulator issue?
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Road Captain
Joined: Oct 2013
Posts: 563
Likes: 4
From: Raleigh, NC
Fuel pump or Regulator issue?
So I changed out the filter and the 2 hoses in the gas tank. Still have the issue. Couldn't find any signs of a leak in the old hoses. I can hear that the fuel pump when it turns on but it seems louder than normal. The sound I thought was holes seems to be the pump or regulator. Can the fuel pump fail and still continue to kick on? Could it be the pressure regulator? The bike has about 50k miles.
Grand HDF Member
Joined: Dec 2007
Posts: 4,999
Likes: 55
From: Bay Area
It can be starting to fail. It depends, if the system were plugged for a lengthy time the pump may have been straining to deliver fuel and wearing out bushings or windings. Now that you released the blockage with a new filter, the pump may be making noise from had been straining for so long.
Road Warrior
Joined: Apr 2010
Posts: 1,648
Likes: 37
From: Monroe, Louisiana
So I changed out the filter and the 2 hoses in the gas tank. Still have the issue. Couldn't find any signs of a leak in the old hoses. I can hear that the fuel pump when it turns on but it seems louder than normal. The sound I thought was holes seems to be the pump or regulator. Can the fuel pump fail and still continue to kick on? Could it be the pressure regulator? The bike has about 50k miles.
Outstanding HDF Member
Joined: Oct 2009
Posts: 2,488
Likes: 30
From: Maryland near DC
usually....if the pump is bad it will continue to run and not pump up to the correct pressure..if it pumps up to the correct pressure and stops it is good..that said, if it is noisy it is prolly going bad...now..if it pumps up and stops, and the pressure is too low the reglulator is bad OR if the pressure is higher than called for and pump continues to run the regulator is bad ..this is the fuel regulator i am speaking of not the regulator for the charging system...if I remember right the pump turns on around <40psi and off around 50psi...
Thread Starter
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Road Captain
Joined: Oct 2013
Posts: 563
Likes: 4
From: Raleigh, NC
usually....if the pump is bad it will continue to run and not pump up to the correct pressure..if it pumps up to the correct pressure and stops it is good..that said, if it is noisy it is prolly going bad...now..if it pumps up and stops, and the pressure is too low the reglulator is bad OR if the pressure is higher than called for and pump continues to run the regulator is bad ..this is the fuel regulator i am speaking of not the regulator for the charging system...if I remember right the pump turns on around <40psi and off around 50psi...
6th Gear
Joined: Aug 2007
Posts: 14
Likes: 2
From: Orange County, Calif
Is it possibly a fuel pump ??
The fuel pump does pump up and stop. Making a different sound than normal. Maybe bearings grinding sound? Once I start it the fuel pump stays on. The motor is popping and backfiring when I give it gas, like it's starving for fuel. I guess if I have to pull it all apart again I might as well change both the pump and the fuel regulator.
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Tourer
Joined: Nov 2012
Posts: 421
Likes: 71
From: Hayward Ca
You should start by testing the fuel pressure with a gauge. It should be somewhere between 55 and 62 and should hold that pressure for a bit when you turn the motor off. This would help you determine if your fuel pressure is high or low or if you have a leak somewhere in the tank.
This is what I use:
http://www.jpcycles.com/product/722-...gc0aAmbS8P8HAQ
This is what I use:
http://www.jpcycles.com/product/722-...gc0aAmbS8P8HAQ
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Road Master
Joined: Sep 2004
Posts: 892
Likes: 8
From: Central Florida
After I did my fuel filter (07 Softail) it ran great for about a month. Then it started running like crap, just as you describe. What happened is the fuel regulator mount cracked, and gas was shooting out of the o-ring it seals with. The whole assembly was hanging out of the mount. As soon as I removed the canopy a bit, and turned the pump on, gas shot about 5 feet across the garage! Just needed a new regulator mount. Fairly simple fix.
Road Warrior
Joined: May 2005
Posts: 1,301
Likes: 24
From: Minden LA
So I changed out the filter and the 2 hoses in the gas tank. Still have the issue. Couldn't find any signs of a leak in the old hoses. I can hear that the fuel pump when it turns on but it seems louder than normal. The sound I thought was holes seems to be the pump or regulator. Can the fuel pump fail and still continue to kick on? Could it be the pressure regulator? The bike has about 50k miles.