2002 Taurus: herky-jerky engine when A/C on

Tiny
EDWARDTIFFIN
  • MEMBER
  • 2002 FORD TAURUS
2002 Taurus, 82,000 miles.
6 cylinder Duratec engine

The car performs fine except when we turn the air conditioning on. At that point, the engine intermittently performs in a herky-jerky manner, particularly at slower RPMs, such as at a traffic light, or when we're backing out of the garage. When we turn the air conditioner off, the symptoms stop immediately.
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Monday, June 25th, 2007 AT 7:00 PM

5 Replies

Tiny
PROBLEMINOHIO
  • MEMBER
I have a similar problem with my 2001 Taurus, same engine. Does your "check engine" light come on when this is happening? If so have the dealer or local parts store check the code with their computer. Autozone does it free for me. The dealer wants to charge $100 just to check. I have a misfire in one cylinder that is currently being working on.
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Tuesday, June 26th, 2007 AT 3:32 PM
Tiny
EDWARDTIFFIN
  • MEMBER
Our check engine light is on all the time, although the engine runs fine when the air conditioner is off. Maybe it's just an Ohio problem since that's where I am too! Thanks for the tip on AutoZone!

EdwardTiffin
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Thursday, June 28th, 2007 AT 9:35 PM
Tiny
PROBLEMINOHIO
  • MEMBER
Good luck with it. See what the code is. If it is a misfire, it could be from many things. Start with the cheapest option which would probably be just running some injector cleaner through the gas tank or changing the air filter. Might want to look at the spark plug if it's on the front bank. Any of the three in the back could be hard to get to. Whoever checks the code for you should be able to tell you which cylinder. I don't think your car is due for a tune up until 100,000 but check the manual.
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Sunday, July 1st, 2007 AT 6:34 PM
Tiny
EDWARDTIFFIN
  • MEMBER
Air Filter is clean, probleminohio.
The engine only jerks when the air conditioner is on. If I just switch to the fan instead of the a/c, the problem goes away.

Thanks!

EdwardTiffin
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Tuesday, July 3rd, 2007 AT 8:51 PM
Tiny
RECNO1
  • MEMBER
Mine just started this also(79,000).because the plugs are supposed to be changed out at 50,000 I am betting on a tune up.Same engine

http://www.edmunds.com/maintenance/MaintenanceServlet
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Saturday, July 7th, 2007 AT 6:16 PM

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