What is causing my van to hesitate?

2001 MAZDA MPV
117,000 MILES
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NICELADY
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Started acting up with no sign, went to start it up and it wouldn't start so I let it sit for about ten minutes and tried again,had to hurry and give it gas and it caught and stayed cranked. I was told it could be a one time thing or something else. It turned out to be something else I have had a new fuel pump,fuel pump regulator,2 O2 sensors,multiple vaccum leaks fixed and replaced, drove good for about two days then I went somewhere and about 2 and a half hours later went to start it and it done the same thing, any ideas would really help.It also has a very fine constant whisteling sound that I was told it was probably nothing to worry about.
Dec 27, 2011 at 1:30 AM
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RASMATAZ
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What Is Causing Van To Hesitate?

Go to this link for more information: http://www.2carpros.com/articles/engine-hesitates
Dec 27, 2011 at 7:49 AM