2004 Gramd Mercury Marquis
I was on a short drive to local market and
car was running fine, after stopping for a
light the engine sounded like I was driving
on a flat tire. Very loud knocking and engine
light started blinking. Help
A flashing check engine light means that the engine is misfiring and damaging the catalytic converter. If you have over 90,000 miles on your Grand Marquis you're due for a tune up. I'd start there. HTH. -Jim
Thank you, Hoping that be the problem, for the engine to go from a purring to loud in a matter of minutes is alarming. I found a friend who has a mechanic cousitowho will have a look this weekend is somewhat a relief. Still a little unsettling since money is tight at the moment. Thank you again.
You're welcome. Glad to help. -Jim
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