It could be either. If the check engine light has come on, have the computer scanned. If not, check for vacuum leaks and check fuel pump pressure. Without a check engine light, it becomes a guessing game. IT could be a throttle position sensor (TPS). However, that is a guess without the check engine light.
For directions on checking the fuel pressure, refer to our home page under the DIY section. There are directions and a video.
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Thursday, February 24th, 2011 AT 4:47 PM