I can hot-wire the left side of fuse no. If an engine lacks a functional fuel pump, that engine will “starve” and immediately stop running. It’s also critical to install motorcycle fuel pumps in the correct way since if it’s done wrong, the entire system can be damaged. If the pump is close to the crankcase, the pulse tube could become damp and the efficiency of pumping fuel will be greatly reduced. 6 and the pump will run, proving that the pump is getting both power and ground, and the connector through the tank is good. The pump should never be mounted on the crankcase of the engine. There are warning signs that you need to check into repairing or replacing your fueling motorcycle parts. Mechanical fuel pumps are usually found on the engine, rather than in the fuel tank, because they rely on the crankshaft to power them. the replacement fuel pump didn't change anything. Irregular resistance inside the fuel pump motor may cause vehicle surging, and indicates a fuel pump in need of repair… The fuel pump in the tank is not running. The following failure signs in motorcycle fuel pumps can help detect a problem allowing quick fuel pump repair. This is because the engine vibrates. Refer to an application specific repair or service manual to help you identify and locate the mechanical fuel pump in your particular vehicle, as they can vary widely in appearance and location. 1. Loud Whining or Droning. 1. Replacing your fuel pump with a new genuine OEM part can be expensive. i bought a 12v lamp type tester and there is no voltage present at the injector connector when turning over the motor. Newer EFI bikes feature a check engine light on the kill switch that blinks a code indicating the problem but a bad fuel pump might just need a new filter. [11] Engine Sputters at High Speeds Hey guys, I am working on a friends bike, a 01 1500 Vulcan Nomad that wont start. Broken Motorcycle Fuel Pump? So I had a broken fuel pump from my old vegas sitting on the shelf, swapped the regulator, cleaned the tank, put the pump back in and boom 51psi! Fuel pump repair and replacement is very important. Failure of external tank fuel pumps is often due to the points. Diagnosing the problem often gives seasoned mechanics a headache. 1. The fuel pump is responsible for getting the fuel from the gas tank to the engine so the bike will run without sputtering or stalling. These guys didn't do a thing in that tank. If you’re driving at freeway speeds and notice your engine sputter or jerk, you may have a failing fuel pump. 6. We are pretty sure that it is a bad fuel pump. You Might be Experiencing Fuel Pump Failure if Your Car Jerks or Sputters at High Speeds Photo by Takashi Hososhima on Flickr / CC BY-SA 2.0. Today's technology doesn't always offer an immediate and exact solution. If you can’t correct the problem with a good cleaning, there is a solution to replace the points contact. this was the first test you asked me to do, but it … Hi Chris, continuing our troubleshooting. If your fuel pump fails, then your bike is going to be stranded. One major sign of a failing or an old motorcycle fuel pump is a clear loud whine or howl when operating. The points can get a lot of dirt and corrosion underneath the protective cap. Car Surging. The pump should be mounted, keeping a distance away from the crankcase. I took the fuel pump relay out and it bench-tested good. It's important to familiarize yourself with the warning signs of a faulty fuel pump—that way you can address any problems before it's too late. Fuel pressure regulator was barely holding on and the tank and the filters were filthy. So it's a no-brainer that a malfunctioning fuel pump is bad news. 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