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Thread: Z20let possible over fueling problem????

  
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    astraz20300bhp's Avatar
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    Z20let possible over fueling problem????

    I have recently done a z20let conversion in my mark 4 astra, I am finding that i am getting no more than 40miles out of £20 of petrol. This happens whilst driving the car at less than 3000 revs!!!!

    Does anybody else have this problem? I am trying to work out whether it is my engine in particular or whether it is something that happens with all Z20LET engines.

    Cheers

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    JCSRI's Avatar
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    Ouch, thats excessive. Get it down to a decent tunist to check and sort it out.
    Where about are you..

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    I'm in Coventry. Someone suggested that it might be because I didn't run a fuel return pipe, could this be the problem? I jus blocked it off!

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    Think you have answered your own question to be honest.^^^

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    Lol mate. Yup, that is the problem. The fuel pump pushes the petrol about 5-6 bars. In the fuel ramp, the pressure is constant as it gets from the pump, but at the injectors goes only what the fpr let trough, and the standard let fpr is 3.3 bar. All the petrol that is in plus, must go back to fuel tank.
    Astra Coupe Z20LET EDS stage 2


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    Thanks for your help guys, purchased return pipe from local scrap yard so will fit tomorrow and see if this does the trick.
    will keep u informed!!!

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