"cough"
5

Asked by JLeonard15 Feb 05, 2011 at 10:26 PM about the 2002 Mercury Grand Marquis LS Premium

Question type: Maintenance & Repair

A new MGM owner and loving it! I notice at 50 - 60 mph and "lugging" a little going up a slight grade the motor will "cough". New fuel filter, new plugs, coil packs "look" ok.  any ideas?

2 Answers
7,415

Jonathan answered 13 years ago

You could be using gasoline that doesn't have a high enough octane rating. High-compression engines need higher-octane fuel to avoid detonation and pre-ignition problems.

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papa answered 13 years ago

run a can of sea fome fuel injector cleaner in a full tank of gas,is the best stuff on the market,it could be a cloged injector from this crappy stuff they call gas today.if you can afford it put in 93 oct with the cleaner.

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