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Stock fuel preasure


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Hi,


I have measured fuel pressure with stock FPR and standard fuel pump.



Results (@ inlet preasure -> fuel pressure):



@ 0 bar (engine off, fuel pump running) -> ~3 bar


@ -0.7 bar (idlling) -> ~2.4 bar


@ +0.7 bar (on boost) -> ~3.3 bar



I am afraid that fuel pressure on boost is too low. Shouldnt it be around 3.7 bar?


What is stock fuel pressure?



Engine is standard 4E-FTE with standard pump, standard FPR, standard turbo CT9, 2.5" exhaust.


Edited by kotbehemot
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Problem is that i don't have wideband. Only standard lambda sensor with single wire.



I have checked fuel pressure becuse during cold start: if i try to start the engine right away i have hesitating.


But when i wait a while with fuel pump on, then it starts faster.


So my shot was that pump dies , because it seems that it needs more time to build the pressure.



Also pump is whining all the time. Something like Walbro does.



I have pulled out the pump today and .. i have no idea what it is.


There is written (see picture):


4124E


12V


MADE IN JAPAN



It doesnt look like original beacuse it has "custom mounting system" :)



Is there any point changing it to genue one?



ozqr.jpg


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Edited by kotbehemot
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After shutting engine off , fuel pressure was droping slowly. But i didn't wait to see what value it will drop to.



Is it good idea to buy AFR gauge for 1V lambda sensor?


I know that reading wont be accurate , but at least i would know if its runnig rich or lean.


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