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CM Code 32: In English please?

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Old Nov 21, 2005 | 06:53 PM
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CM Code 32: In English please?

the truck's CEL just barely started to flicker on while driving to work this morning. i just pulled codes and received the following:

KOEO code 11 (yay!)
CM code 32

according to http://fordfuelinjection.com/index.php?p=14 , this code means "EVP circuit has intermittently failed below minimum voltage of 0.24 volts." anyone wanna translate that to english for me?

Mike
 
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Old Nov 21, 2005 | 09:30 PM
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Run a test while the engine is running to see if that code comes up.

32 might mean that the EVP sensor is going bad. A fast way to test it, is too backprobe it with a voltmeter, and push the EVP plunger all the way in. You should see the voltage rise as you press the plunger in.
 
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Old Nov 21, 2005 | 09:40 PM
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OK, i guess i should ask what EVP stands for and, more importantly, what it does.

Mike
 
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Old Nov 21, 2005 | 09:54 PM
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EVP= EGR Valve Position Sensor

It's the sensor that sits on top of the EGR Valve. It has a little 'plunger' gets shoved in as the EGR valve opens. Voltage rises as the plunger gets shoved in. The PCM(computer) sees this voltage so it knows exactly how much the EGR valve is open.
 
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Old Nov 21, 2005 | 10:04 PM
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A Haynes or Chiltons manual will explain how the system works.
 
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Old Nov 21, 2005 | 10:33 PM
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so, what would be a symptom if this was really a problem? truck seems to run fine other than getting crappy mileage and a little studder in the idle.

Mike
 
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Old Nov 21, 2005 | 11:04 PM
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EGR problems can have wide-ranging effects, including bad mileage and a lopey idle.
 
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Old Nov 22, 2005 | 11:44 PM
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well, in the morning, my CEL flickers on and off while i'm cruising down the road doing about 50 in 5th. it does this until warm, then nothing.

Mike
 
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