Code 32
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Code 32
some time ago had a code 32 showed up which was the EGR valve, so I removed and cleaned it up real good put it back on, was driving down the interstate and the SES came on, read the code and was a 32 again, I then cleared it drove down the interstate few days later and it came on again..........from what Ive read it doesn't hurt the car if the EGR isn't working right, so when the SES light comes on "which is only at freeway speed I just attribute it to the EGR and hope its not doing any damage .
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From: Anaheim CA
The EGR error only occurs after you have been cruising for about 5 minutes. You must have a steady throttle, which makes it impossible to get this error when driving around town.
If you have an '89 or earlier it could be the EGR temperature switch in the EGR crossover pipe. After the ECM commands EGR it looks for that switch to close as hot exhaust gasses pass through the EGR pipe. Later years used the MAP sensor to detect EGR operation.
A more likely source of your error is a bad EGR solenoid. It applies vacuum to the EGR valve when commanded by the ECM.
If you have an '89 or earlier it could be the EGR temperature switch in the EGR crossover pipe. After the ECM commands EGR it looks for that switch to close as hot exhaust gasses pass through the EGR pipe. Later years used the MAP sensor to detect EGR operation.
A more likely source of your error is a bad EGR solenoid. It applies vacuum to the EGR valve when commanded by the ECM.
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Joined: Jul 2014
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The EGR error only occurs after you have been cruising for about 5 minutes. You must have a steady throttle, which makes it impossible to get this error when driving around town.
If you have an '89 or earlier it could be the EGR temperature switch in the EGR crossover pipe. After the ECM commands EGR it looks for that switch to close as hot exhaust gasses pass through the EGR pipe. Later years used the MAP sensor to detect EGR operation.
A more likely source of your error is a bad EGR solenoid. It applies vacuum to the EGR valve when commanded by the ECM.
If you have an '89 or earlier it could be the EGR temperature switch in the EGR crossover pipe. After the ECM commands EGR it looks for that switch to close as hot exhaust gasses pass through the EGR pipe. Later years used the MAP sensor to detect EGR operation.
A more likely source of your error is a bad EGR solenoid. It applies vacuum to the EGR valve when commanded by the ECM.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Thread Starter
Pro
Joined: Jul 2014
Posts: 642
Likes: 11
Short ALDL A&B with key=on will energize the EGR solenoid. Makes it easy to check.
Non-function EGR affects NOX in an emissions test. In Cali, on the rollers, functioning EGR is important for in-limits NOX readings. Some techs will also stick their fingers in the back and depress the diaphragm. If the engine doesn't stall, they will fail it for "non-performing EGR" under the Visual Test.
You can do the same thing. With it idling, depress the diaphragm. If the engine doesn't stall, or only slows down a little bit, remove the EGR valve and clean out the passages in the manifold. I've never cleaned a LT1 manifold, I can't tell you where the likely blockage will be. One of the holes is open to the plenum, the other goes to the pipe that goes to the exhaust manifold. With it running there should be tons of exhaust out of one of the holes, and manifold suction in the other one.
Non-function EGR affects NOX in an emissions test. In Cali, on the rollers, functioning EGR is important for in-limits NOX readings. Some techs will also stick their fingers in the back and depress the diaphragm. If the engine doesn't stall, they will fail it for "non-performing EGR" under the Visual Test.
You can do the same thing. With it idling, depress the diaphragm. If the engine doesn't stall, or only slows down a little bit, remove the EGR valve and clean out the passages in the manifold. I've never cleaned a LT1 manifold, I can't tell you where the likely blockage will be. One of the holes is open to the plenum, the other goes to the pipe that goes to the exhaust manifold. With it running there should be tons of exhaust out of one of the holes, and manifold suction in the other one.
clean the manifold passages?? doesn't that involve removing the manifold?
