Re: EGR keeps clogging up
I have a '94 s10 4x4 blazer. I've replaced the EGR valve FOUR times. Carbon deposits are getting into the valve, causing it to stick open. When this happens, the engine loses its vacumn and runs like crap (especially at idle). Yesterday, I had both pieces of the intake manifold cleaned out and a new EGR valve installed. Within a 5 miles test drive, the valve stuck AGAIN! I've tried to get at the root cause of this carbon build up, and the service tech says its just the BAD GAS here in OHIO (BS?) Any Ideas?