We see this one all the time and this morning Smoky throwed it.
Had to take Annie to the vet for her rabies and distemper shots and on the way home on popped the SES light. Couldn't tell anything was wrong with the truck so I came on back to the house and did the quick check with the jumper wire and got the code 32. First I checked the vacuum hoses,no problems there. Then I did the EGR solenoid test using a hand vacuum pump. Yup, that passed too. While I was pulling a vacuum on the EGR valve the gauge went to almost 10"hg before the EGR finally popped open but it did close when I bled the vacuum off. I pulled the EGR and it was pretty clean,only a little light brown carbon on the valve and in the manifold and not crusty at all. I pulled a vacuum on the valve once it was off and it did the same thing. Vacuum rose to just under 10"hg then pop, the valve released. I sprayed the valve stem with PB Blaster and repeatedly pulled it open and let it close until it quit sticking and would start to open at 2"hg. I pulled it open again and reached in there and painted the stem with antiseize then worked that in with the vacuum pump. Reinstalled the valve, cleared the code and hit the road. No more code 32. I probably could have just sprayed the PB Blaster on the stem with the valve in place but I wouldn't have known the condition of the valve and how much carbon may have built up behind it.
So, when y'all are chasing a code 32 and all seems OK check for a sticky valve stem.
Had to take Annie to the vet for her rabies and distemper shots and on the way home on popped the SES light. Couldn't tell anything was wrong with the truck so I came on back to the house and did the quick check with the jumper wire and got the code 32. First I checked the vacuum hoses,no problems there. Then I did the EGR solenoid test using a hand vacuum pump. Yup, that passed too. While I was pulling a vacuum on the EGR valve the gauge went to almost 10"hg before the EGR finally popped open but it did close when I bled the vacuum off. I pulled the EGR and it was pretty clean,only a little light brown carbon on the valve and in the manifold and not crusty at all. I pulled a vacuum on the valve once it was off and it did the same thing. Vacuum rose to just under 10"hg then pop, the valve released. I sprayed the valve stem with PB Blaster and repeatedly pulled it open and let it close until it quit sticking and would start to open at 2"hg. I pulled it open again and reached in there and painted the stem with antiseize then worked that in with the vacuum pump. Reinstalled the valve, cleared the code and hit the road. No more code 32. I probably could have just sprayed the PB Blaster on the stem with the valve in place but I wouldn't have known the condition of the valve and how much carbon may have built up behind it.
So, when y'all are chasing a code 32 and all seems OK check for a sticky valve stem.