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FJR Motorcycle Forums
Technical & Mechanical Problems
Fuel Pressure Reg
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<blockquote data-quote="3dogs" data-source="post: 940030" data-attributes="member: 424"><p>36 psi of fuel pressure without enough volume will cause a lack of power at full throttle. I have worked on 100’s of cars/trucks that had a bad fuel pump that could produce good pressure. The engine would run good at part throttle but not at full. I used a digital lab scope to look at the wave form produced by the fuel pump’s armature. A bad pump could be diagnosed before it actually want bad, thus warning the customer that it was time for a new pump.</p><p></p><p>It's interesting to note that Snap-On and MAC Tools sells a fuel pressure gauge that has a dedicated extra hose and a trigger valve that allows a pump volume test. I guess only an idiot would use a Styrofoam cup for the fuel volume test and smoke at the same time. Maybe pump volume testing is an activity you should leave to a professional technician.</p></blockquote><p></p>
[QUOTE="3dogs, post: 940030, member: 424"] 36 psi of fuel pressure without enough volume will cause a lack of power at full throttle. I have worked on 100’s of cars/trucks that had a bad fuel pump that could produce good pressure. The engine would run good at part throttle but not at full. I used a digital lab scope to look at the wave form produced by the fuel pump’s armature. A bad pump could be diagnosed before it actually want bad, thus warning the customer that it was time for a new pump. It's interesting to note that Snap-On and MAC Tools sells a fuel pressure gauge that has a dedicated extra hose and a trigger valve that allows a pump volume test. I guess only an idiot would use a Styrofoam cup for the fuel volume test and smoke at the same time. Maybe pump volume testing is an activity you should leave to a professional technician. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Fuel Pressure Reg
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