I'd like to take a poll and see how many people with EGR carbon problems were/are using PREMIUM unleaded. After wearing out the bolts on my EGR, I had a really good GM guy ask me the same question. Wanting to "use the best" I almost always used premium.
Clean it up one more time, switch to regular gas, run some "Sea Foam" cleaner every now and then. The first time I used a full can of the stuff I actually blew carbon chunks out the tailpipe! Also had so much loose carbon in the EGR I couldn't believe it!

So, fess up. How many been usin' the premium?

I was having the same problem. Every now and then I would get chunks in my EGR and have sluggish power. I would take the EGR off and clean it out at least monthly. Where do you buy this "sea foam" and do you put it in the fuel tank? :)

Sea Foam can be hard to find and it's not cheap. It's in a white metal can with red lettering last time I bought some (like a tall brake fluid can). In NC you can get it at Advance Auto Parts and Northern Tool, maybe other places. About $6 a can or more. You can put it anywhere. Gas, oil, spray it into intake. I use it in all my 2-strokes. It stabilizes the gas as well.

I'm NOT trying to sell the stuff, it's just unusual to find some snake oil that really works. Do an Internet search on it and I think you'll see alot of people like it.

I don't use premium fuel in mine, mid grade only. I believe most of my carbon trouble started out as CPI troubles & short trips on the '92. I still stick the pintle every now & then and take it apart to unstick it.

I use mid grade (89) after looking at my plugs from using 87 for awhile.

As you are asking about premium petro, I just wish to add .02 cents worth for the snake oil that works!

Sea Foam has been around for decades, recognized by the F.A.A (a will ran guberment agency that works) and works as claimed. Sea Foam's best name to claim may be how well it works of varnish, like sticky valve-train components.

Sea Foam maybe wouldent do a dang thing for a newer engine other then stabilize the fuel , but most older engines and fuel systems would benefit from a snort of Sea Foam from time to time, it works!

* A few drops in older air tools helps add a little more zip also.

Worked wonders on my Blazer and my fiances new mustang. Her mustang would lose power big time when going up hills. It would sputter and miss. Not anymore !! A lil bit of it in her gas and she was good as new.