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93 Impreza 1.8L lacks power - help!
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Thread: 93 Impreza 1.8L lacks power - help!

  1. #1
    Noobinator
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    Default 93 Impreza 1.8L lacks power - help!

    I bought a used 93 Impreza with the 1.8L engine for my son recently. I thought it was a little underpowered when I test-drove it, but my son is a lead-foot, so I let it slide. As time has passed, I have come to believe that the engine isn't producing anywhere near the 115 hp that it should. Also, the gas mileage is poor. I have already changed the spark plugs.
    Any suggestions?
    I read somewhere else that it might be an issue with the timing pulley, perhaps it got over-torqued following a timing belt change. This would throw off the valve timing. But it didn't say anything about how to fix it.
    I would appreciate any help I can get.
    Thanks.
    Last edited by comtnbiker; 09-13-2009 at 08:55 PM.

  2. #2
    Suby Talker
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    Default

    if the timing is off one tooth the engine would feel under power. but this usually throws an engine code if you off. I would start with the basics and make sure you have the correct compression 156-185psi with 128 being minimum the right gapped spark plugs .039-.043" and have the fuel filter changed and the fuel injectors cleaned if your timing belt is off I can send you detailed instructions on how to change it. Good luck and if you have any other questions please call or email.

    thanks
    Eric
    AMS
    5-axis cnc cylinder head porter
    master machinist/engine builder
    1-800-210-8675

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