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?
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.
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.
Search Mercury Grand Marquis Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Mercury Grand Marquis Experts