Hey jamahl i have a 04 grand marquis question for you is would you happen to know why at a red light stopped the marquis hesitates/ rumbles and will go slowly up to speed and like jump almost when it gains full power and then it is fine it does not do it all the time but does it frequently also i have had all spark plugs changed as well as the ignition coils.check engine is on and the code thats read is ignition coil number two and ihave switched that coil again incase its defective coil but it still comes back on with computer reset..hope you can help thanks in advanced
My car has 165500 miles.
My car has an automatic transmission.
The first thing to try is to disconnect the mass air sensor and drive it to see if the hesitation is still there. If hesitation is gone then replace the mass air sensor and drive to see if hesitation has improved. Clear the check engine lights and drive to verify problem is gone.
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