03 wrx back fires shifting gears
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This is a discussion on 03 wrx back fires shifting gears within the Motorsports Talk forums, part of the Community - Meet other Enthusiasts category; hello all,just recently boughtan 03 wrx.but it has started back firing whie shifting gears.just one loud pop than all is ...

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    03 wrx back fires shifting gears

    hello all,just recently boughtan 03 wrx.but it has started back firing whie shifting gears.just one loud pop than all is fine.does it need the timing checked?or just a regular tune up?

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    Administrator TheJ's Avatar
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    Any mods done to it?
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    injen cold air,invivida upsteam,downpipe,and cat back exhaust

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    Registered User silverbullet>>>'s Avatar
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    what type of bov do you have?
    Turbo XS BOV, ERZ Down Pipe, ERZ catback, Cobb intake, Perrin Turbo inlet, Perrin Up Pipe, Walboro 255 fuel pump, Ultimate Racing 680cc injectors, gm boost solinoid, Exedy clutch, thermo tech turbo heat wrap, perrin light weight pulley,TGV delete's, 8mm intake manifold phenoic spacers, TXS racing FMIC, Tial 38mm wastegate
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    it has an aftermarket one on it not sure the brand,it was on the car when i bought it

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    Resident meany-rator 06wrx4me's Avatar
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    Quote Originally Posted by badbrad692 View Post
    it has an aftermarket one on it not sure the brand,it was on the car when i bought it
    Theres your problem!
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  8. #7
    Registered User silverbullet>>>'s Avatar
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    your probly runnning rich and it wont be able to tune it out. the reason it back fires is cause unburned gas is going down you exhaust and when enough of it lays in the pipes it pops or back fires
    Turbo XS BOV, ERZ Down Pipe, ERZ catback, Cobb intake, Perrin Turbo inlet, Perrin Up Pipe, Walboro 255 fuel pump, Ultimate Racing 680cc injectors, gm boost solinoid, Exedy clutch, thermo tech turbo heat wrap, perrin light weight pulley,TGV delete's, 8mm intake manifold phenoic spacers, TXS racing FMIC, Tial 38mm wastegate
    Tuned By DPS
    http://www.dpstuning.com
    Team Downshift Member

  9. #8
    Registered User teflon_jones's Avatar
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    1. Get rid of the BOV and replace it with a stock BPV.
    2. Get EM to support those mods.
    3. Get rid of the intake and replace it with stock (not 100% necessary to get the car running right but the intake isn't doing you any favors either).
    Scott
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    i guess thats why everyone on this site says to buy stock

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