Question about 1999 Chevrolet Lumina
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?
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
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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