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Used ford Ecoline van with a thermo king -300 cooln unit mounted.. van cools but when the truck speed increase,the temp inside the van increases until the van slows down. No manual of cooln unit&van

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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harley9701ha
  • 424 Answers

SOURCE: Air Conditioner Problems

Check for a vacuum leak. The vacuum cannister under the evap. case will crack and cause a leak. I just install a new vacuum cannister,check valve and hose going to inside of van.

Posted on May 29, 2009

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  • 18 Answers

SOURCE: Speedometer and tachometer not working

This is a tricky one. You have two sensors for your speedometer and tachometer, if one is malfunctioning then both will. Check and replace if necessary, good luck

Posted on Jul 05, 2009

Molson02536
  • 3854 Answers

SOURCE: My ford escape 2005 start to vibrate shortly after

You could have a worn out U joints, if your only getting the vibration during the acceleration period. Check the condition of the U joint to the drive shaft and tires. Good luck and hope this helps.

Posted on Aug 07, 2009

Rayvin1943
  • 97 Answers

SOURCE: After the engine has warmed

check the module and coil pack in the distributor

Posted on Aug 07, 2009

CMV9
  • 594 Answers

SOURCE: 2002 dodge durango whinning noise will your

Thank you for getting back to me. I would like you to check your transmission fluid. start the engine and let it warm up at idle speed for about 15 min and check the fluid. It sounds like you do not have enough in it, there for the whining noise with increase of speed since your transmission is speeding up with the rate of your vehicle. If this does not help and the problem persist please let me know. If the noise you were hearing was coming from the u joints of the vehicle it would not make a whining noise with increase of speed. The u joints will only make a noise when they are going bad when the vehicle is shifted into any gear from the shifter( EX: park to drive, park to reverse ECT.)


Posted on Jan 13, 2010

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1 Answer

What can I do about high idle when engine is warm?


Is your air condition on? This will increase engine speed.
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Whenever I turned on the air condition in my Ford Explorer 2006, after few second the radiator Fan start running very frequently on high speed making noise. When the fan starts on high the rpm of the...


The cooling fan is supposed to come on when the /ac compressor clutch cycles on, and off when it cycles off.
The idle speed kicks up to compensate for the additional a/c compressor load and the additional alternator load. usually, just the low speed comes on until it hits a much higher temperature.

the system should cycle 4 to 7 times/minute at 79 degrees F.

Here are some things to consider:(The PCM (engine computer) is NEVER defective, don't replace it). I don't think it is the ECT (engine coolant temp sensor) or the Cylinder Head Temp Sensor. Or the VSS or the MAF sensors.


The electronically controlled fan clutch is controlled by the powertrain control module (PCM) based upon requests for airflow to cool the engine, transmission and A/C condenser. If no cooling is required, the electronics permit the fan to spin at a slower speed yielding improved fuel economy.
-------------------------------------------------------------------------------------------------------------------------------
Inoperative or damaged:
  • Electronically actuated fan clutch
  • Electronically actuated fan clutch controller
  • Wiring, connectors, relays or modules
  • Engine Coolant Temperature (ECT) sensor (4.0L SOHC)
  • Cylinder Head Temperature (CHT) sensor (4.6L [3V])
  • Mass Air Flow (MAF) sensor
  • Vehicle Speed Sensor (VSS)
  • ----------------------------------------------------------------------------
If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
Retrieve any DTC Codes (Diagnostic Test Code). Autozone will do for free.

--------------------------------------------------------------

The cooling fan clutch actuator valve controls the fluid flow from the reservoir into the working chamber. Once viscous fluid is in the working chamber, shearing of the fluid results in fan rotation.

The cooling fan clutch actuator valve is activated with a pulse width modulated (PWM) output signal from the powertrain control module (PCM). By opening and closing the fluid port valve, the PCM can control the cooling fan clutch speed. The cooling fan clutch speed is measured by a Hall-effect sensor and is monitored by the PCM during closed loop operation.

The PCM optimizes fan speed based on engine coolant temperature (ECT), engine oil temperature (EOT), transmission fluid temperature (TFT), intake air temperature (IAT), or air conditioning requirements. When an increased demand for fan speed is requested for vehicle cooling, the PCM monitors the fan speed through the Hall-effect sensor. If a fan speed increase is required, the PCM outputs the PWM signal to the fluid port, providing the required fan speed increase.

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Air Conditioner Problems


Check for a vacuum leak. The vacuum cannister under the evap. case will crack and cause a leak. I just install a new vacuum cannister,check valve and hose going to inside of van.

May 28, 2009 | 2002 Ford E350

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