Question about 1999 Ford Taurus

1 Answer

High idle on in neutral.

Post running the car out of gas. Car lurched and High idle. Lurch got better with gas treatment but idle still high and if it drops runs rough.

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  • Ford Master
  • 5,678 Answers

Could be IAC sensor,control low idle.

Posted on Dec 06, 2014

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Thunderbird

IAC valve makes rpm high when having much dust in it.
Replacement costed me $200.

Posted on Aug 01, 2008

clarktravis8
  • 74 Answers

SOURCE: 2005 Ford Taurus SE 3.0L V6 OBD Codes P0171 and P0174

The P0420 code is a Catalytic converter efficiency code check the compression.Swap the #1 injector to a different location to see if the code follows.Test the coilpak. A cracked exhaust manifold is the most likely cause p0171 and 0174 Induction air leaks, vacuum or some kind fuel restriction, weak fuel pump, restricted fuel filter etc.You also could have an exhaust leak near the upstream o2 sensor. If youtake it in they will probably use smoke to find out where the leak is.

Posted on Apr 22, 2009

  • 111 Answers

SOURCE: my car idles high 1.7 to 2.0 rpm

Check the IAC valve. Not sure where it is on Ford vehicles. It controls the idle.

Posted on May 22, 2009

pippall
  • 1486 Answers

SOURCE: idle is high after changing the timing belt

Replace the idle speed control valve.Very common on fords this fails.And what you are telling me are the same symtoms.Good luck m8.

Posted on Jul 08, 2009

solasknows
  • 199 Answers

SOURCE: High/rough idle on Ford Expedition

i will check idle speed sensor, most likely this is the problem, and the fuel consumption problem can be related to O2 sensor which makes the car idle very badly, so i suggest you check both
thank you
good luck

Posted on Aug 17, 2009

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I have the same problem with the "lurch and lunge". I cleaned my MAF Sensor, changed my plugs and ignition wires, and now changed the fuel filter. The car runs much better, but I still get the "lurch and lunge" if I step hard on the gas after slowing down (like for a turn). So, if I hit the gas hard when I'm going around 10mph, it still happens.

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You could try disconnecting the air valve and see what happens.The car may stall when idling if you turn on the air, just set it to idle high and leave the air on all the time :)
Keep me updated man

regards
robotek

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