Why does my car sputter every now and again when my a.c. is on and I'm going about 60mph? It only does this 3sec rumble when the ac is on and I'm going over 55mph

Asked by grandy61 Sep 25, 2014 at 01:17 PM about the 2000 Mercury Grand Marquis LS

Question type: Maintenance & Repair

2000 mercury grand marquis 67k miles.

6 Answers
143,755

T_S_T answered 9 years ago

The ac put,s strain on motor,even at this speed,have you changed plug,s and wire,s lately?

Mark helpful
143,755

T_S_T answered 9 years ago

All of them,spark plug,s to start,then if it continues,change the wire,s.

Mark helpful

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