Rustyv8 Posted October 14, 2020 Share Posted October 14, 2020 Hi guys - just hooked up the chassis mounted fuel pump tonight. I’m assuming that at ignition position II I should hear the pump hum a little as it primes? Because I’m hearing nothing. it gets power at pos. II alright, and it’s earthed correctly etc. however the tank is empty as that’s also new - do I need fuel in there for it to be able to build pressure and prime or?? Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted October 14, 2020 Share Posted October 14, 2020 Well, you need fuel to build fuel pressure, yes Quote Link to comment Share on other sites More sharing options...
Rustyv8 Posted October 15, 2020 Author Share Posted October 15, 2020 Ok thanks, I assumed it would make some noise even without having fuel. Quote Link to comment Share on other sites More sharing options...
mickeyw Posted October 15, 2020 Share Posted October 15, 2020 It certainly won't build pressure if there is no fuel for it to pressurise, but I would have expected to hear the pump running. Check you earths etc. Quote Link to comment Share on other sites More sharing options...
Quagmire Posted October 15, 2020 Share Posted October 15, 2020 Most facets (cylindrical and posi-flow style) make a clicking/tapping type noise, which when they are run dry is extremely fast. If you are priming the fuel system after replacing a hose for example you will normally hear it start fast and then slow down as everything primes and it has something to push against. They aren't quiet so if you can't hear anything the pump isn't running! Quote Link to comment Share on other sites More sharing options...
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