My 94 Q had the 32 code EGR SYSTEM MALFUNCTION....the little hose connected to the valve was split, so we replaced it and cleared the codes...the light came back on with the same code...my question is what is next? and what are the steps?
I need to Clean or possibly replace the EGR VALVE? Clean the inside of the hoses? Check the solenoid? Etc...
This issue is new to me, so i don't know what to do next but cleaning/checking/or possibly replacing the EGR VALVE i can do...just need the right instructions...
Thanks for your time.
32 EGR CODE, How do i check this/Clean or replace VALVE/etc.
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Q451990
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Re: 32 EGR CODE, How do i check this/Clean or replace VALVE/
The EGR valve rarely fails, but the port that it feeds in the plenum frequently clogs up.
Cleaning is best accomplished by removing the plenum, but you're on the hook for replacing all of the brittle hoses that break in the process - so you may want to try cleaning it out on the car if possible.
At a minimum, you need to remove the throttle body, EGR valve, and EGR temperature sensor. Then just go to work with whatever tools you can find to get the built up carbon out of the port. I use an old metal dental pick, and sometimes a drill bit that's slightly smaller than the port. Unfortunately it makes a 90 degree bend at the end of the port before feeding into the plenum, so you need access from both ends to really accomplish the cleaning. The EGR valve will have some carbon build-up, so you can clean it at the same time. I have never seen any real build-up in the tube that connects the EGR valve to the exhaust manifold.
You should be able to get everything relatively clean in a few hours with several cans of brake parts cleaner. Clean the throttle body at the same time, and replace the throttle body and EGR gaskets.
Here's a picture of the plenum with the throttle body removed. The red arrow points to the port where it feeds the plenum, and the green arrow shows where your EGR temp sensor screws in.
Good luck!
Heath
Cleaning is best accomplished by removing the plenum, but you're on the hook for replacing all of the brittle hoses that break in the process - so you may want to try cleaning it out on the car if possible.
At a minimum, you need to remove the throttle body, EGR valve, and EGR temperature sensor. Then just go to work with whatever tools you can find to get the built up carbon out of the port. I use an old metal dental pick, and sometimes a drill bit that's slightly smaller than the port. Unfortunately it makes a 90 degree bend at the end of the port before feeding into the plenum, so you need access from both ends to really accomplish the cleaning. The EGR valve will have some carbon build-up, so you can clean it at the same time. I have never seen any real build-up in the tube that connects the EGR valve to the exhaust manifold.
You should be able to get everything relatively clean in a few hours with several cans of brake parts cleaner. Clean the throttle body at the same time, and replace the throttle body and EGR gaskets.
Here's a picture of the plenum with the throttle body removed. The red arrow points to the port where it feeds the plenum, and the green arrow shows where your EGR temp sensor screws in.
Good luck!
Heath
Re: 32 EGR CODE, How do i check this/Clean or replace VALVE/
Thanks alot for the picture and the instructions, much appreciated!!