habib99 Posted December 16, 2010 Share Posted December 16, 2010 Hi everyone. Since swapping my fuel tank for a new one (and relocating it) the fuel pump has developed (getting worse and worse) a loud vibrating grinding type noise and the car is really hard to start and runs like crap. Trying to find someone who can check the fuel pressure tomorrow, I'm away from home and have no tools! Any ideas about a systematic approach to sorting this please? Quote Link to comment Share on other sites More sharing options...
Loyale 2.7 Turbo Posted December 16, 2010 Share Posted December 16, 2010 (edited) Your Subie's Fuel Pump is Electric and it came Stock Located Next to the Tank... if you Moved the Tank, you Should moved that Fuel pump with it, 'cos if it Stays too Long from the Tank, it Might Suck Air and since Fuel Pumps are Cooled by the Passing Fuel, Suckin' Air will Overheat & Damage the Fuel Pump. Also it Should be Placed as the Stock Placement Was, in order to allow it to Obtain a Free Fuel Flow... Hope this can Help. Kind Regards. Edited December 16, 2010 by Loyale 2.7 Turbo Quote Link to comment Share on other sites More sharing options...
naru Posted December 16, 2010 Share Posted December 16, 2010 Start by checking the fuel pressure. Quote Link to comment Share on other sites More sharing options...
habib99 Posted December 16, 2010 Author Share Posted December 16, 2010 thanks, yes, I think I have it in a decent position - like the stock position, wide bore pipe and short from tank to pump, it's the awful noise that's coming from it that is worrying me. Quote Link to comment Share on other sites More sharing options...
habib99 Posted December 16, 2010 Author Share Posted December 16, 2010 Start by checking the fuel pressure. after the regulator or just the raw pump pressure? can you advise the normal range? Quote Link to comment Share on other sites More sharing options...
naru Posted December 16, 2010 Share Posted December 16, 2010 after the regulator or just the raw pump pressure? can you advise the normal range? You need to tee into the supply line to the rail.Don`t deadhead the pump. Around 36psi above atmospheric,IIRC.Less w/running engine w/intake vacuum. Quote Link to comment Share on other sites More sharing options...
habib99 Posted December 16, 2010 Author Share Posted December 16, 2010 You need to tee into the supply line to the rail.Don`t deadhead the pump. Around 36psi above atmospheric,IIRC.Less w/running engine w/intake vacuum. thanks, obvious now that you've said it - T off, I'll have to take it to a garage anyhow, just can't stand not knowing myself what/how to do it. Thanks again - pressure at the rail - place to start. Quote Link to comment Share on other sites More sharing options...
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