EGR Troubleshooting
Thread Starter
Instructor
Joined: Aug 2016
Posts: 100
Likes: 14
From: Augusta Georgia
EGR Troubleshooting
So I went to drive the Vette to breakfast Wednesday and I believe I now have a failed EGR system. The car will barely start, runs horrible and stalls. I have not had an issue before this beyond an occasional Check Engine Light
after longer drives that always leaves a H32 (EGR History) code. I jumped the correct pins to read the codes and I have 1 - C12, 4 - H32, 7 - Err, 10 - ---. I read through the Service Manual and the symptoms all point to the EGR
system, hoping to troubleshoot this weekend. Does this sound like the correct diagnoses based on these symptoms?
Can I get the EGR valve off without removing the intake? Any other suggestions for diagnosing?
Thanks,
Chuck
after longer drives that always leaves a H32 (EGR History) code. I jumped the correct pins to read the codes and I have 1 - C12, 4 - H32, 7 - Err, 10 - ---. I read through the Service Manual and the symptoms all point to the EGR
system, hoping to troubleshoot this weekend. Does this sound like the correct diagnoses based on these symptoms?
Can I get the EGR valve off without removing the intake? Any other suggestions for diagnosing?
Thanks,
Chuck
Thread Starter
Instructor
Joined: Aug 2016
Posts: 100
Likes: 14
From: Augusta Georgia
I am finally back from a work trip, so far I have used a vacuum pump to the EGR and it maintained 25 psi with only minimal drop in pressure. I started the car while vacuum was applied to the EGR and it still runs terrible. The car barely runs, won’t maintain idle speed and I have to give it gas to keep it running. For the record it ran great the last time I drove it before this problem started. I guess the next step will be to remove the EGR which means removing the intake plenum.
Thread Starter
Instructor
Joined: Aug 2016
Posts: 100
Likes: 14
From: Augusta Georgia
I replaced the EGR valve and after putting it all back together the car is doing the exact same thing as before. I am going to start looking at the ignition system, though there were no
codes captured beyond the Historical EGR code. If anybody has another idea I would appreciate it hearing it.
codes captured beyond the Historical EGR code. If anybody has another idea I would appreciate it hearing it.
