Question about 2004 Toyota Corolla

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Getting terrible gas milage. only 25 mpg!!

Tires are ok. Could spark plugs make it this bad? I have tried fuel additives but nothing changed.

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  • gogomaust Dec 11, 2008

    I got great gas mileage for along time--over 32 mpg; it dropped to 28 mpg last year and now I am getting about 25 mpg. I have 84,000 miles on my 04 Corolla (my 4th Corolla) and the local Kwik Kar says I don't need a tune-up, and recommends fiuel injector service at $144.

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Shouldn't be spark plugs unless you are at about 100,000 miles or more because on your vehicle you have platnum plugs and aren't required to be changed until every 100,000 miles. One thing i would recommend is to have your car sea foamed. See if your local dealer does this, otherwise find someone in your area that does this service. This product, Sea Foam, is a great product that will break down the built up carbon deposits and clean out your intake manifold and head from these deposits. Along with this get the throttle plate service done as well. All this should help with your gas milage and help the motor to run better and even idle better. Hope this helps

Posted on Nov 12, 2008

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Sorry but if you think the plugs are wrong then you are a sunday mechanic and this sort of problem if its electrical will be above your head,check colour of spark plugs and if blackish clean out the air filter,are the brakes binding ??if not and the air filter is clean then run car into local garage,could be anything from low compression caused by worn valve seats to broken piston rings

Posted on Nov 12, 2008

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