Tech Support Forum - View Single Post - 1991 chevy s10 blazer 4.3 engine backfires in intake manifold

**Raylo** · 05-30-2008, 05:03 AM

I'm not sure if there is an easy way to check it visually without removing the EGR and looking at the valve butterfly and cycling it by hand to check for freedom of movement. When the EGR failed like this on my S10 I was out of town and had to take it to a shop for repair. Maybe one of the pros here might have some advice as to how to check. I did have to pull the EGR during a cam swap on my Camaro awhile back and it wasn't a hard job. But I didn't have any EGR issues then so I didn't pay much attention to it.

05-30-2008, 05:03 AM	#4 (permalink)
Raylo TSF Enthusiast Join Date: Feb 2006 Location: Maryland, USA Posts: 525 OS: XP Desktop, Vista HP Notebook, XP Notebook	Re: 1991 chevy s10 blazer 4.3 engine backfires in intake manifold I'm not sure if there is an easy way to check it visually without removing the EGR and looking at the valve butterfly and cycling it by hand to check for freedom of movement. When the EGR failed like this on my S10 I was out of town and had to take it to a shop for repair. Maybe one of the pros here might have some advice as to how to check. I did have to pull the EGR during a cam swap on my Camaro awhile back and it wasn't a hard job. But I didn't have any EGR issues then so I didn't pay much attention to it.