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post #1 of 3 (permalink) Old 06-17-2019, 02:50 AM Thread Starter
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08 Rhino 700 Fuel Pump

ok guys I'm new to this on UTVs .. I'm not getting my plug wet and can't hear my fuel pump cut on.. is this a bad pump or will any relays or sensors kill power to my fuel pump ? thanks in advance
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post #2 of 3 (permalink) Old 06-18-2019, 08:31 AM
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Normally the pump will turn on temporarily when you turn the key to "on". Pump can also be activated in the diagnostic mode. Suggest disconnecting the fuel line (where it connects to the intake) and then turning on the key to see if it's pumping fuel. Also, here's a video about how to measure your fuel pressure.

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post #3 of 3 (permalink) Old 06-18-2019, 09:13 AM
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Quote:
Originally Posted by HighDezRhino View Post
Normally the pump will turn on temporarily when you turn the key to "on". Pump can also be activated in the diagnostic mode. Suggest disconnecting the fuel line (where it connects to the intake) and then turning on the key to see if it's pumping fuel. Also, here's a video about how to measure your fuel pressure.

https://www.youtube.com/watch?v=afkKsYVyrM8&t=42s

Nice presentation Todd. Back in the day (way back..) I was a Drivability tech for various Ford dealerships. In testing fuel pressures and drivability issues I used a very similar setup as what you demonstrated in the video. The pressure relief button on the gauge was used for just that, relieving static pressure when you were ready to disconnect to avoid spraying fuel everywhere. Then I discovered something that was not yet in the books (mass produced fuel injected vehicles was still fairly new) - and I don't know if this would apply to the Rhino. I found that by pressing the button, with engine running, would kill the motor. I had the run off hose (from the tester) going to a jar so I could check fuel quality. Several vehicles I tried this on would kill the engine, but most vehicles didn't skip a beat and produced good fuel flow. Then "the light in my head" came on. If a vehicle had a restricted fuel filter the engine would die whenever I pressed the pressure relief button - changing the filter would correct the issue. Back in those days tune-ups were recommended every 10K miles, including a costly fuel filter. Now, with my newly discovered diagnostic trick, customers would not be charged for a new fuel filter every 10K unless they failed the flow test.
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