When did this problem start? What does the temp gage read. What is the outside air temp. Sounds to me like when warm, the startup mixture is too rich, which is why giving it more air by stepping on gas pedal helps. Then the wet plugs misfire until the combustion heat cleans them off. Take plugs out and inspect for sooty dark black look. If so, putting new plugs in may temp solve problem. You can also get the old ones cleaned. I use a sand blaster. It seems to work best.
Make sure your MAP sensor hose is not loose/damaged. Map sensor should be on top left shock tower. Your temp sensor could also be out of range. It should be on top of thermostat housing where upper radiator hose meets engine head. This is just a guess untill more info is provided.
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Thursday, October 14th, 2010 AT 8:31 PM