1993 wrx loss of power
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This is a discussion on 1993 wrx loss of power within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Hey my names matt, Today i purchased a subaru wrx 1993 the car is completely standard, has no mods. Not ...

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    1993 wrx loss of power

    Hey my names matt,

    Today i purchased a subaru wrx 1993
    the car is completely standard, has no mods.
    Not even a boost gauge

    Now the car runs fine during normal driving and light acceleration
    but when i accelerate over 3500rpm-4000rpm and i feel boost coming on
    it completely looses power.(feels like the engine dies but it doesnt) the rpms drop right down to 0
    then shoot right back up.
    It doesnt do this every time, if i accelerate gradually it is usually fine but if i ever try accelerate more then say quarter of the pedal being down, it just cuts out.

    this is my first subaru so really have no idea where to start.
    any suggestions would be great

    Thanks

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  3. #2
    Admiral Ackbar the 1st mycologist's Avatar
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    Could be many things, but replacing the fuel filter and checking your pressure might be a cheap place to start.
    "From a little spark may burst a mighty flame." - Dante
    "The stitch is lost unless the thread is knotted." - Italian proverb

  4. #3
    Registered User SilentSide's Avatar
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    Quote Originally Posted by mycologist View Post
    Could be many things, but replacing the fuel filter and checking your pressure might be a cheap place to start.
    Yup. Sounds like fuel starvation.

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    Thanks for the advise, will do fuel filter asap. when you say pressure you mean fuel pressure aye.?
    also, is it possible that it could be a vacuum hose collapsing or something like that?

    Matt

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    just and update,

    Replaced the fuel filter and the air filter and the thing located in the picture ( no idea what it is called )
    also tried out a different air flow meter.

    still has the problem
    some more information though, when it looses power it sounds like air is escaping, sort of like the blow off valve but alot louder.

    is it possible that the standard blow off valve is broken? ie letting out pressure when it shouldnt be?
    or even the waste gate ?Click image for larger version. 

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    might just end up taking to the mechanics :/

    Matt
    Last edited by syneptik; 04-13-2013 at 10:08 PM.

  7. #6
    Admiral Ackbar the 1st mycologist's Avatar
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    You should get or make a boost leak tester (google it, plenty of instructions).
    "From a little spark may burst a mighty flame." - Dante
    "The stitch is lost unless the thread is knotted." - Italian proverb

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    Hey, just an update

    tightened the clips on the hose between the intercooler and the throttle body and since then, problem is gone.
    dont want to speak to soon but i think that was all that was wrong.
    going good now xD

    only problem is, i already purchased the fuel pump lol. o well doesnt hurt to have a spare.

    Thanks for the advise guys

    Matt

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    update

    took it for another test drive, still does it. when it happens though can hear air escaping. so thinking it might be a leak. will do fuel pump tomorrow just in case.

    any chance it could be my alternator?
    as the battery light and handbrake light came on today

    Matt

  10. #9
    Admiral Ackbar the 1st mycologist's Avatar
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    If you hear it, it is very likely a boost leak.
    "From a little spark may burst a mighty flame." - Dante
    "The stitch is lost unless the thread is knotted." - Italian proverb

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    Hey, replaced the fuel pump. thought it was running fine. on the flat it didnt cut out at full throttle. but then when i went up a hill and tryed it cut out.

    so thinking the next thing to do will be the coil pack i think.
    will cost me $400 though so not looking foward to it.

  12. #11
    Admiral Ackbar the 1st mycologist's Avatar
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    Did you do the filter too?

    Finding a leak is free. Do that first.
    "From a little spark may burst a mighty flame." - Dante
    "The stitch is lost unless the thread is knotted." - Italian proverb

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    Hey,

    Yup so far i have done

    *Fuel Filter
    *Fuel Pump
    *Air Filter
    *reset the ecu ( probly not impotant to note but might aswell)
    *tried a friends Air flow meter
    *replaced the standard BOV with another standard BOV

    problem still occurs

    im going to try find a leak, i reved the engine and felt around the connections but no luck finding any leak.
    although it only cuts out at full boost ( 4k rpm )

    Matt

  14. #13
    and the Funky Bunch Calvinball's Avatar
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    Fill a spray bottle with some soapy water, spray it around the intake hoses and such, it will bubble where/if there is air escaping.
    - Will
    First Mods: What to do and what not to do
    Current Car: 2014 Golf TDI
    Previous Cars:2012 WRB WRX Hatch, 2004 RSX-S, 1998 Grand Prix GTP
    "Isn't it amazing how smart you feel when you just aren't being stupid?"

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    Quote Originally Posted by Calvinball View Post
    Fill a spray bottle with some soapy water, spray it around the intake hoses and such, it will bubble where/if there is air escaping.
    okay, will try that today

    cheers

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    update

    fixed the issue, found out it was the coils. 2 were cracked. one ended up dying 2 days ago and the othre one was fine.

    bought some second hand ones, one had a crack so had to buy a brand new one.

    car does not cut out any more.

    Churr!!!

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