If the check engine light has never come on, check fuel pump pressure. The pump could be getting weak.
Here is a How To video you can view for directions. Also, the gauge can be rented at many parts stores. If you can't find one, they sell them at the test equipment store site on this page.
https://www.2carpros.com/dia/test_fuel_pressure.htm
Let me know what you find.
Joe
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Friday, March 20th, 2009 AT 1:34 PM