I recently returned to Texas from a trip out to Camp Lejeune, North Carolina for some training. While on my return trip and about 700 miles from home, I noticed a fairly loud clatter while cruising at 65 mph down the highway. I immediately pulled over to see what was going on and noticed the truck was running very rough and sounded like all the rockers had loosened up. I turned the truck off and checked everything out, all fluids were where they needed to be and everything appeared as it should. I had only used 1 dose at my last fill up of a 100 gallon Diesle Kleen bottle, I run the recommended dose every fill up, so I figured worse case I had a hung injector or two. Started the truck and the clatter was still there, so I dumped the rest of the bottle in the tank, there was probably just north of 3/4's a tank a fuel in there. I limped it down the highway maybe another 20 or so miles to a Love's truck stop to assess the situation further, the clatter never quit and still was running fairly rough. I didn't have my head together so I didn't get a screen shot of my injector rates, but they were all over the place -7's and +5's, and you could feel the out of balance while limping along. At loves I went ahead and changed all my fuel filters as I had new ones with me and topped off with more fuel (pump said up to B20). Fired her back up and let her run for just over an hour and the rates came back down and she started running better. Went ahead and topped off with fuel again and hit the highway, and she's back to normalish! It's not making any oil and appears to be running fine, but I'm noticing an ever so slight fog out of the exhaust at idle (barely noticible in daylight) and a noticeable diesel smell from the exhaust. Prior to this the return rates were all within spec my highest was number 8 at -3.0 warm in drive.
Would it be a problem to change just 1 or 2 injectors or are they required to be done as a matched set? My worst 1 in drive is number 8 at -7.0 while up to temperature and at -6.0 in park, but the number 1 is not far behind at 4.0 in drive. Last set of injectors were done only 35k ago by GM to the tune of $2,876.16, I just don't want to replace them all if the others are fine.
Drive:
Park:
Would it be a problem to change just 1 or 2 injectors or are they required to be done as a matched set? My worst 1 in drive is number 8 at -7.0 while up to temperature and at -6.0 in park, but the number 1 is not far behind at 4.0 in drive. Last set of injectors were done only 35k ago by GM to the tune of $2,876.16, I just don't want to replace them all if the others are fine.
Drive:
Park:
