Question about 2003 Mercury Grand Marquis

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While driving when I try to accelerate after 30 miles per hour my car pulsates before picking speed.The car seems like loses speed before it pickup speed.

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It's hard to say if this is something more dire than this, but have your spark plugs and wires checked out.

If a cylinder is not igniting properly when you accelerate, it would definitely cause this problem.

I had a car where it would 'jump' when I was trying to accelerate past 30-40mph and switching the wires fixed it right up. Hope this helps!

Posted on Mar 13, 2011

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Posted on Jan 02, 2017

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at the begging u should clarify how many gallon u used.
112 miles at 28 miles per gallon --> 4 gallons burned (112/28)
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Now figure out how long the car was driving.
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So, leak was at a rate of 7 gallons in 1.75 hours
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