car is sputtering and jerking

2002 BUICK RENDEZVOUS
132,000 MILES
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TIFFANY22
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My car is sputtering and jerking as I am driving down the highway after I reach 55mph... also my gas gauge is floating... could this be from the same problem.... I do know one of my spark plugs has a miss

It Just started doing this a couple of days ago.... It does not do it while I am driving in the city and when I push on the gas it has pick up still but when it is sputtering it feels like it is going to run outta gas....
Mar 21, 2012 at 7:07 AM
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FIXITMR
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is check engine light on? might be EGR problem or fuel pump problem

check this link

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

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Mar 21, 2012 at 7:11 AM