In your question it is not clear to me that you understand what 'putting the gas pedal to the floor while cranking' means to a fuel injected vehicle, so I apologize if you new this already. This process is actually telling the computer to 'clear flood mode'. The computer will not fire the fuel injectors if you hold down the gas pedal and crank. Its possible you have a bad temp sensor that is telling the computer the engine is cold so during crank time when your engine is warm, the computer thinks your engine needs more fuel to start than a warm engine does. So anyway, check those temp sensors. You can check them visually by removing and looking for leaks or cracks and with a multimeter.
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Wednesday, November 26th, 2008 AT 3:23 PM