pcm trouble code 32
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Instructor
Joined: Nov 2007
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From: greenwood lake new york
pcm trouble code 32
hey guys,i did the old paper clip diag on my 86 vette and code 32 is coming up,i think its a egr code how do i find out the repair for this problem? i dont want to start throwing parts at this.possible egr valve? i wonder if this could be a part of my long crank,gas fume smell problem....
Drifting
Joined: Aug 2010
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From: Montgomery Texas
hey guys,i did the old paper clip diag on my 86 vette and code 32 is coming up,i think its a egr code how do i find out the repair for this problem? i dont want to start throwing parts at this.possible egr valve? i wonder if this could be a part of my long crank,gas fume smell problem....
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I would physically remove, then inspect the EGR valve diaphragm. You can also test its operation with a Mity-Vac and a dental mirror, but I like to be more "hands-on" when making my diagnosis.
Typically, the EGR valve diaphragm dry rots from age and engine heat, resulting in loss of vacuum power and valve failure.
After you remove the valve, (and if you determine the diaphragm isn't bad), clean any carbon buildup you might see over the passageway with carb cleaner. Don't get any carb cleaner on the gasket.
Hold the EGR valve horizontally and spray carb cleaner on the pintle. Use a toothbrush to clean the pintle and remove any buildup.
Typically, the EGR valve diaphragm dry rots from age and engine heat, resulting in loss of vacuum power and valve failure.
After you remove the valve, (and if you determine the diaphragm isn't bad), clean any carbon buildup you might see over the passageway with carb cleaner. Don't get any carb cleaner on the gasket.
Hold the EGR valve horizontally and spray carb cleaner on the pintle. Use a toothbrush to clean the pintle and remove any buildup.
Last edited by onedef92; Sep 2, 2010 at 07:39 AM.
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First, the metal tube with the foil on it is the EGR gas supply line.
The sensor on it is a resistance unit that tells the ECM that exhaust gas is flowing in the tube. The hotter it gets, the lower the resistance.
The EGR solenoid is commanded open, and the vacuum goes to the EGR valve, opening it. In order for the ECM to know that the EGR gasses are flowing in the tube, The General places a feedback temp sensor that tells the computer that the tube is getting hot. That should mean that the EGR valve has opened.
Normally, when there is no flow in the tube, the upper end of it gets relatively "cold" and the sensor reports to the computer that it is so.
If the computer has comanded the solenoid open, and the temp sensor does not report a drop in resistance, it assumes that the valve has remained closed, and throws a code.
The sensor on it is a resistance unit that tells the ECM that exhaust gas is flowing in the tube. The hotter it gets, the lower the resistance.
The EGR solenoid is commanded open, and the vacuum goes to the EGR valve, opening it. In order for the ECM to know that the EGR gasses are flowing in the tube, The General places a feedback temp sensor that tells the computer that the tube is getting hot. That should mean that the EGR valve has opened.
Normally, when there is no flow in the tube, the upper end of it gets relatively "cold" and the sensor reports to the computer that it is so.
If the computer has comanded the solenoid open, and the temp sensor does not report a drop in resistance, it assumes that the valve has remained closed, and throws a code.
