My 2000 GTP just started whining at low rpm, like below 2000. I was on my way to work this morning and in started sputtering and jolting as if I had a misfire. I'm almost certain it isn't misfiring because I just did a tune up about two months ago. Now this was at 70 mph since I drive the highway for about an hour everyday. When I went to lunch just driving through the city it whines a lot at low rpm and it seems at a loss for power.

I could really use some advice and tips on what to look for. I'd really appreciate it guys. This is my only vehicle at the moment and I can't afford for it to go down! Thanks in advance for whoever comments.

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