marktheherald Posted March 10, 2009 Share Posted March 10, 2009 Having posted a rather long-winded query in the Herald section and not getting any replies, I thought I would try a basic question here in the tech. section... What effect would a stuck-open inlet non-return valve have in an AC type fuel pump? Mark. Link to comment Share on other sites More sharing options...
gilesdive Posted March 10, 2009 Share Posted March 10, 2009 Bottom line, if the non-return valve is stuck open, it won't pump.The diaphragm will suck fuel from the tankas it goes one way.Going the other, instead of being forced to push the fuel towards the engine, the fuel will take the path of least resistance - some of it might go towards the engine, but I suspect most of it will go back towards the fuel tank. Link to comment Share on other sites More sharing options...
partsaver Posted March 10, 2009 Share Posted March 10, 2009 I concure with the gent above. Link to comment Share on other sites More sharing options...
monty69 Posted March 10, 2009 Share Posted March 10, 2009 The won't work! buy a new one Link to comment Share on other sites More sharing options...
marktheherald Posted March 11, 2009 Author Share Posted March 11, 2009 Thanks for your input folks, I don't know how long the valve has been stuck open, but performance (twin Stroms on a 1500) has not been affected. It just seems to have been very thirsty. I don't know if that is anything to do with the stuck valve, but I shall monitor mileage with the replacement pump and post an outcome result when I can. Mark. Link to comment Share on other sites More sharing options...
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