running lean.

Discussion in 'Modifications And Maintenance' started by cam, Jun 3, 2008.

  1. cam
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    cam Active Member

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    i have an 04 sti with the following performance mods..
    Fp Green turbo
    Tial 44mm external wastegate
    invidia dp
    erz performance mid mipe and cat back (but noo cats )
    p&l up pipe
    pe 650cc injectors
    255lph walbro fuel pump
    aps stealth fmic with red hardpipes
    aps cold air intake
    perrin turbo inlet
    perrin recuric bov

    the car was "tuned" buy jorge ... but i replaced the stock bov after the tune.. and it ran fineeee all winter. it started warming up(ok this doesnt make sense) and now its running lean.... and thats causing the timing to be over advanced... soo im throwing cels p0171 and p011 and p021....

    i replaced the fuel pump...
    and maf..

    and i have new pe850cc injectors to put in... and the tune is on the 18th.

    the car is having a rough time ideling. there are a lot of pops in the exhaust.
    its almost making like a churning noise and it stumbles.. drops low in rpm then shoots back up.

    think i need new... fuel filter? i have new plugs but dont want to do them my self... ne suggestions? ne thing to get fixed b4 the tune?
     
    cam, Jun 3, 2008
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  2. fobiawrx
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    fobiawrx Fabiola

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    what bov did you get? if its leaking then you have a vacuum leeck which can cause the car to lean out. put the stock bov back on and see if it goes back to ware it should be.
     
    fobiawrx, Jun 3, 2008
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  3. cam
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    cam Active Member

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    i got the perrin recuric. and it was still randomly running lean with the stock one on there. but not as much and it ran fine with perrin one on for a while. check my myspace look for cameron maxon i havea lot of engine pics.
     
    cam, Jun 3, 2008
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  4. Ylime
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    Ylime Well-Known Member

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    ^ just post them up on here...use [​IMG] tags.
     
    Ylime, Jun 3, 2008
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  5. fobiawrx
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    fobiawrx Fabiola

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    do you have it on its stiffest setting?
     
    fobiawrx, Jun 3, 2008
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  6. cam
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    cam Active Member

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    [​IMG] no but i have it at a spot where it runs... lol i dont really want tto mess with it because i did that... started stiff drove.. let up on it.. drove ... and it took me a while to get right. how do u replace the fuel filter? do u think that could be ne thing?
     
    cam, Jun 3, 2008
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  7. fobiawrx
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    fobiawrx Fabiola

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    get a fuel pressure gauge and check. if your fuel pressure drops then that could be it? but i cant see that being the problem.
     
    fobiawrx, Jun 3, 2008
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  8. cam
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    cam Active Member

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    im gonna ask them to check that when i get it tuned. hopefully they wont chatge me much for it since i am paying them to instal my injectors and tune it.. and ive allready had it dynoed there b4.
     
    cam, Jun 3, 2008
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  9. fobiawrx
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    fobiawrx Fabiola

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    the guys at db are good people. im sure they will cut you a deal. might want to check with rs motors too. they are a more subaru oriented shop
     
    fobiawrx, Jun 3, 2008
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