Question about 1999 Ford Taurus

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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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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Thunderbird

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

Posted on Aug 01, 2008

  • 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

  • 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

  • 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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1 Answer

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91 Buick Century-About 75-80% of the time I will start my car or sometimes after I've been driving it for 30 min or less the service engine light will come on and stay on or flashon and off . It idles...

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Idling to a stall or idling up to 3000rpm the lurches hard

i have the same car it was doing the same i change the mass air flow sensor now run like a brand new car but cost me arround 400$ but to make sure just buy the spray can to clean it you'l se if it run better or go for a scan in a car chop,I hope this gonna help you! ya!Patrick give me some news...

Apr 05, 2009 | 2001 Hyundai XG300

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The car lurches and lunge at times as if it is not getting fule properly, I want to change the fuel filter but not sure where it is located

I just replaced the fuel filter in my 2002 LeSabre last night. It is under the car, about foot in front of the drivers side rear wheel, about 16" in. My fuel line at the screw on connection had some rust, so I think I may need to have that replaced.

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.

For your benefit (and mine), what other components could cause the problem and are DIY replacable.

Feb 18, 2009 | 2000 Buick LeSabre

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OK, I know this will sound Dumb But, Try it, It should work. It sounds like the Seal on your Gas cap is Allowing a Small amount of Air to Seap into the Fuel tank. Get a New Gas Cap and see if it does not Remedy this Situation.

Jan 19, 2009 | 1995 Eagle Talon

1 Answer

Too fast idle running speed.

Typical idle for this motor is right around the amount you have described. Check to see if any check engine lights are on, or if the ABS light is on. A typical issue with this motor is the OVP relay that when not operating properly causes the engine to rev much too high (~1500-2000). Also do your revs drop significantly when you put the car into gear? If not then there really isnt an issue. When the motor is idling too high and you stick it into gear the car will typically lurch really hard.

Jan 19, 2009 | 1986 Mercedes-Benz S-Class

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1994 Corvette

sounds like a sticky idle air control valve

Sep 11, 2008 | 1994 Chevrolet Corvette

1 Answer

Surge Problem

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


Jun 20, 2008 | 2001 Ford Crown Victoria

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