Question about 1999 Chevrolet Lumina

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Hard Accelleration at highway speeds

I have a 1999 Chevrolet Lumina LS and when i am driving between 70 and 75 miles pr hour on the highway it sarts to shutter as if it is not getting any gas? when i accellerate to 80 miles per hour it evens out and runs fine. Any suggestions?

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  • scowper2007 Mar 08, 2009

    There was water in the fuel. Problem is now solved

  • Anonymous Mar 14, 2014

    hesitating and stuttering when warm, under load - such as accellerating up a hill. I drive 20 miles to work, about 15 miles from home I have to transfer to another highway, up an onramp and accellerate to join traffic. The car jerks back and forth, feels like not enough gas or lack of flow, or electrical. Any ideas?

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When then same thing happened with mine after going through a long list of parts it ended up being a combo of a bad mass airflow sensor and intermittent misfiring coil packs

Posted on Dec 08, 2011

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Since I work in government, my first question should be why would you need to go over 70 mph, but since I have a lead foot and a long list of speeding tickets on my record, I will keep my mouth shut on that topic. While cruising in the 70-80 mph, your transmission should already be in top gear, so you can probably eliminate the transmission. There are several possible causes of your problem including a vacuum leak, fouled plugs, bad spark plug wires, a dirty air filter, or a dirty fuel filter. Review your service records and see what has been replaced and when, then start looking at what hasn't been replaced. Sorry I can't be more precise without laying hands on it.

Posted on Mar 05, 2009

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