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Runs full throttle - Cavalier Chevrolet Cars & Trucks

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Usually a sign the throttle plate is stuck open, or you have a huge vac leak somewhere.

Posted on Jul 16, 2013


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Disconnect the MAF sensor and see if it changes rpm's. Pull off the big boot at the intake. Is the throttle valve wide open? If it is, the throttle body assembly needs cleaning-maybe it is stuck?
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Half throttle or less?Then the demands for full throttle are missing,How is the air filter?Check the air filter it may be plugged.And at more open throttle you need more fuel. You may want to service the fuel filter,At full open throttle the vehicle needs to breath and it also needs to exhale.These two component are just the start for a function inspection If these two serviceable componenet are met,and you still have this problem we can move from this and remedy the situation form a plugged exhaust to a TPS having a bad swipe.Also try a airflow sensor cleaning with the MAF (Mass air flow)

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Make sure that the throttle cable is not damaged or binding and that the throttle plate in the throttle body is clean and closing fully. Also check all vacuum hoses for breaks and good connections and that the idle air control motor (next to the throttle position sensor on the throttle body is working.

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Check your exhaust flow from the rear and see if you feel any exhaust coming out you may have a bad catalytic converter

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Its the Fuel Filter...mine did the same thing :)

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Look under the hood. Look for the throttle body .The accelerator cable is attached to it. The cable housing anchor is broken and not letting it return to idle speed.. Use a portion of a clothes hanger to
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