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Old 23 Nov 2009, 06:01 pm
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Default Honda Accord 1994 Acceleration problem?

My Sister has a Honda Accord 270,000 Miles the car is running good, but whenever she turns it on, it accelerates itself the RPM's increase withouth pressing the gas, What can be the problem?
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Old 23 Nov 2009, 06:16 pm
hey hey is offline
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tune up
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Old 23 Nov 2009, 06:31 pm
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the problem is its a honda
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Old 23 Nov 2009, 06:46 pm
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YES ten points for 2112!!! I agree!!! Other than that, check intake hose for holes and or vacuum leaks
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Old 23 Nov 2009, 07:31 pm
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1 manual tranny? clutch slipping

2 auto tranny? tranny dry or no good [usually torque converter]
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Old 23 Nov 2009, 07:46 pm
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Big vacuum leak. Honda vehicles use Manifold Pressure Sensors instead of Mass Air Flow sensors, so they don't care where the air comes from - a vacuum leak is the same as opening the throttle. For the same reason, the old trick of using carburetor cleaner to hunt for the leak doesn't work - the mixture is already okay.

If the leak is at the manifold gasket (I just changed the one in my daughter's 1993 Accord last week because it had a huge leak) it will probably cause the idle to cycle high for a couple seconds, then cut way back for a fraction of a second, over and over like clockwork as the computer tries to control the mixture in spite of the leak affecting one or two cylinders more. That doesn't happen at first, only as the leak gets worse.

Finding the leak is a simple but dirty DIY job. Replacing the manifold gasket (if that is the problem) is a medium to large job. To confirm and locate an intake leak, remove the duct from the air cleaner box, plug the breather port (comes in the side of the duct, place the duct on your face and try to pressurize it with your lungs. It should be leaking a bit through the PCV valve but should feel tight. If you can exhale through it, have a friend feel and listen for where the air is coming out. In my daughter's 1993 Accord the paper manifold gasket was in many pieces and very brittle. Replacing it controlled the idle.
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Old 23 Nov 2009, 08:01 pm
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Have your car a major tune-up! Hope this helps!
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Old 23 Nov 2009, 09:01 pm
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"Micheal" is right about the vacuum leak.The idiots who posted "it's a honda" are uninformed nerds.
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