Question about 2001 Ford Ranger Regular Cab

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2001 v6 4.0 ranger erratic idling at stop

Hello,

I've got an 2001 v6 4.0 that i have just recently purchased, and already have had the tranny rebuilt, but am now noticing the truck lurches just a tiny bit while idling. The truck seems to be running strong, as i just got back from driving it a couple days in Baja, but this erratic idle is annoying. Is this indicative of a vacuum leak? The truck has a about 111k miles on it. thanks.

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  • Ford Master
  • 5,618 Answers

Any codes? tune up, dirty throttle body.fuel filter air filter.clean fuel injectors add some fuel cleaner.

Posted on Aug 05, 2017

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  • Master
  • 347 Answers

That's where I would start. Get a spray bottle with water in it and a few drops of dish soap just to make it sudsy. Start the truck and spray around all of the vacuum lines, intake manifold, etc. If the idle goes up, that's your leak. Good luck

Posted on Aug 05, 2017

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6ya6ya
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Posted on Jan 02, 2017

  • 59 Answers

SOURCE: 97 Ford Ranger 4.0L V6 Idles rough only when cold

Orand

Ther is a air Idle control valve located on the side of the throttle body. unplug it remove it spray it and clean it with carb cleaner replace it plug it back in and you will be a Happy person again.

Lugnut61

Posted on Feb 01, 2009

  • 398 Answers

SOURCE: 1997 ford ranger idol problems

MIGHT be the tps
The TPS is sensitive to heat, moisture and vibration leading to the failure of some units. The sensor is a sealed unit and cannot be repaired only replaced. A TPS may fail gradually leading to a number of symptoms which can include one or more of the following: -

  • Poor idle control: The TPS is used by the ECU to determine if the throttle is closed and the car should be using the Idle Air Control Valve exclusively for idle control. A fault TPS sensor can confuse the ECU causing the idle to be erratic or "hunting".
  • High Idle Speed: The TPS may report faulty values causing the engine idle speed to be increased above normal. This is normally found in conjunction with a slow engine return to idle speed symptom.
  • Slow engine return to idle: A failing TPS can report the minimum throttle position values incorrectly which can stop the engine entering idle mode when the throttle is closed. Normally when the throttle is closed the engine fuel injectors will be deactivated until a defined engine RPM speed is reached and the engine brought smoothly to idle speed. When failing a TPS will not report the throttle closed and fueling will continue causing the engine to return to idle very slowly.
  • Engine Hesitation on Throttle Application: The TPS is also used by the ECU to determine if the driver has applied the throttle quicker than the Manifold Air Pressure sensor can read. The fueling is adjusted acordingly to cope with the sudden increase in air volume, however a faulty sensor can cause the ECU to ignore this data and the engine will "hesitate" when applying the throttle. In extreme cases with the engine at idle, a sudden application of full throttle can stall the engine.
  • Engine Misfire: A fault TPS can report values outside the deined acceptable range causing the ECU to incorrectly fuel the engine. This is noticable as a slight misfire and can trigger the misfire detection software and/or Malfunction Indicator Lamp (MIL) light on the dashboard. Extreme cases can cause excessing misfires resulting in one or more cylinders being shut down to prevent engine and catalytic converter damage.
[edit] Manual recalibration In all cases a manual recalibration of the TPS may resolve the issues at least on a temporary basis. To recalibrate the TPS: -
  1. With the engine off, insert the key and turn the ignition to position 2 (On) without starting the engine.
  2. For MEMS-equipped cars (S1), quickly press and release the accelerator pedal several times (at least 5, but to be sure 8 or 9) using as much of the throttle travel as practicable. This will trigger the ECU into the closed-throttle reference learn algorithm, which has it looking for the lowest measured static throttle position (the closed position). The throttle position calibration is a fixed definition from this point.
  3. Turn the ignition off, remove the key and wait for the ECU to power down (about 30-40s).
  4. Start car as normal.

Posted on Feb 26, 2009

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

wyatt1582
  • 453 Answers

SOURCE: 1988 Ford Ranger Super 2.9L V6 Hesitating and Stalling out

Check EGR valve this controls idle speed it might have carbon build up hold the valve open. All so check fuel pressure.

Posted on Jun 26, 2009

  • 52 Answers

SOURCE: 2001 focus. Replaced plugs, wires and coil pack.

Have you replaced the timing belt? if not i would highly recommend doing so. these cars need to have the timing belt replaced before it breaks otherwise it can and will cause major engine damage.

Posted on Aug 11, 2009

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