Car lacks power going up hill, had cat. converter replaced, helped but still struggles up the mountains.

Asked by Feb 11, 2017 at 06:43 PM about the 2004 Mercury Grand Marquis

Question type: Maintenance & Repair

2 Answers

55,265

Is the check engine light on? How many miles on this car? Have the coil on plugs ever been changed? Have the spark plugs ever been changed?

100

There's a lot of things it can be start with what Bob said, ck for engine codes if any post them here.I have worked on Fords for 25 years what year is the car and what engine is in it

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