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1997 ford ranger, a/c compressor keeps turning off and on only when the engine is at idle, what could be causing this?

The a/c compressor is a year old and i just had it checked for leaks and freon levels, it checked ok

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Problem high pressure switch or faulty condenser fan
the pressure in the system is going too high because the condenser is not getting cooling air when idling to allow the heat transference when changing from gas back to a liquid

Posted on May 09, 2017

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Posted on Jan 02, 2017

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1997 ford escort idles rough when hot


1997 escort idles rough, the first thing is to make sure the throtlebody plate is clean. This sounds like the idle may be staying to low at times if it smooths out with ac on, when the ac is turnned on the computer raises the idle a touch to make up for the strain on the engine from the ac compressor, clean throtlebody and look at and clean idle air control valve, if this valve is not controlling the idle when needed the engine will idle lower than normal and cause a rough idle.
Another thing is the sparkplug wires, take a look at those, if at night or with a good eye use a spray bottle and spray a mist over the wires and watch for any sparking, this spark may be very small so look at each wire closely or may be big enough to see and hear. this is where i would start. good day.

Apr 10, 2012 | 1997 Ford Escort

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I have a 97 ranger(2.3)When I use the heat or defrost the engine starts revving up high.It goes back to normal as soon as I turn off the heat.


the engine computer is rasing the idle speed when ever the a/c compressor starts to operate. So it is adding too much air and therefore fuel. The duty cycle of the fast idle solenoid or compensator is off. Check the idle air controls.

Aug 27, 2011 | 1997 Ford Ranger SuperCab

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My 2000 Ford Ranger keeps showing codes PO 171 and


These codes mean that the oxygen sensor is reading too "Lean" on both the left and right cylinder banks and the engine control system can't compensate any further to solve the problem. You may have a dirty or failing Mass Airflow Sensor that is miscalcuating the amount of airflow the engine is taking in which in turn can cause both of these codes to set. If the sensor is reporting less air than the engine is actually taking in then the engine computer will add only the amount of fuel it should based on what it was told by the sensor which will cause both cylinder banks to run "lean". There could be something else going on such as having two bad oxygen sensors [very rare] but I do see these two codes together quite often and usually its the sensor that is causing it. Hope this helps a bit!

Jul 11, 2010 | 2000 Ford Ranger SuperCab

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2.3 will not idle, you can keep it running if you


change fuel filter and add a can of SEAFOAM(parts stores) to a 1/2 tank of Premium gas. Try it. and when you do, look inside the fuel filter and see the goop that's causing most of your problems. your vehicle suffers from EGS

Sep 06, 2009 | 1997 Ford Ranger SuperCab

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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.

Feb 26, 2009 | 1996 Ford Explorer

2 Answers

Ford ranger 1997 2.3 engine problem


Sounds like the idle bypass valve is nfg. Try checking engine codes first. Try this link, you'll find it helpful. http://autorepair.about.com/od/troubleshooting/a/OBD_codes.htm . If you need to know how to check the codes, ask back here, I'll explain. Hope this helps.

Jan 03, 2009 | 1997 Ford Ranger SuperCab

1 Answer

1991 ford ranger 4l supercab


idle air control is ran by the power of motor cause the compressor is attached to motor for the compressor you need an idle air control module for a/c compressor this should bring life back to your a/c

Jun 06, 2008 | 1991 Ford Ranger Supercab

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