Golden80

The SES light is turning on and it gives me a code 32. It does it when the coolant temp gets above 200 degrees. When the temp of the engine goes back down to around 190, such as from driving on the highway, the SES light will turn off. I know it has something to do with my EGR, but I'm not sure exactly what.

Thanks,
Matt

vader86

I get it too, i just ignore it.

Its usually the solenoid/switch or a clogged up EGR pipe. Then sometimes its just that you dont have your gas cap tight.

lead foot 85 vet

Same here on my 85...............its irritating because if I get another engine light I'll just think it's the EGR.




[Modified by lead foot 85 vet, 2:23 PM 8/11/2003]

BLACKFLY86

QUOTE: "I get it too, i just ignore it."
Im so glad to hear this, I have been getting the SES light since I got the car. All systems seem to run fine. car never runs too hot, oil pressure stays constant, ect. It usually comes on after about 20 minutes of steady highway cruising (65=75 mph) ? if it is the EGR, is this an expensive repair? I'd love to get rid of that annoying light!

LaVidaLoca

EGR can fault in two modes; stuck open and stuck closed. It has a temperature sensor on the valve that tells the ECM if hot exhaust gas is being passed thru it. A code 32 sets when the sensor is closed at start up or the sensor was not detected after the following conditions for 4 minutes;

1. Coolant temp > 176
2. EGR duty cycle commanded by ECM >27%
3. TPS not at idle or WOT
4. No codes 21, 22, 33, or 34

Problems can be the ECM, Control Solenoid, bad vacuum hose, bad EGR valve or bad EGR sensor. Code will definitely set if you unplug the vacuum to the EGR or unplug the wire from the control solenoid.

Not too expensive or hard to repair. On an 85 just pull the plenum and the EGR comes off with 2 bolts.

vetteseniorcit

The most common cause of this code is a bad or intermitent EGR switch located on the EGR pipe between the exhaust manifold and the intake manifold. Replace this switch first. Next check the electrical connections at the EGR valve solenoid and the ECM. Check all vacuum lines for leaks, especially around the EGR valve. It is unlikely, but there could be a possible ECM failure. I had this problem when I had my '87 and it was a combination; bad switch and a broken vacuum line.

TA

Same here. I started getting the dreaded "32" after putting on a better flowing exhaust system. I've since replaced every piece of EGR equipment, but still get a code 32. I'm getting so sick of it I'm having a chip burned to eliminate that code. As someone else said I get the code so often that I assume its a 32 when the SES comes on.

Southern Comfort

:iagree: Its a summer thing. I finally tuned it out. Although I do still check the codes when the light comes on any other time.

C10 JDR

http://www.geocities.com/jgkov/EGR.html

LaVidaLoca

I have seen this before. I am a little concerned about the diode going out and putting the wrong voltage into an ECM input. I have been kicking around an idea like this except use the 12v going to the EGR solenoid to drive a relay and then use the contacts of the relay to switch to ground like the sensor does. I'll try to get around to this sometime soon and post the results. Should be able to find a sealed reed relay at Radio Shack that would do the job.

70ZZ3 96LT4

Fixed the intermittent code 32 on my 85. Then heat sensor that screws into the EGR valve was bad. Replaced it and have not had a code 32 since 92 on this car. The sensor was not expensive, but just a little involved on the the 85 to change this sensor out since the EGR valve is located under the plenum. Be careful in installing the sensor. There is some type of substance at the top of this sensor where the wire comes out of the part. Mishandling this part will make this substance crumble. I replaced the first one I bought because of this. Was real careful installing the next one. Hope they have improved this substance.

C10 JDR

I can appreciate your concern, but if you put in a hugely overrated diode, it will probably last longer than any other electrical component in the car. Most standard components are chosen to be just big enough for reasons of cost. If you are overly concerned, probably best to live with the code 32.

I have a big Schottky diode which will go in when I get round to it.

That's how I see it anyway :D