Join Date: Jan 2007
Location: Traverse City, MI
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Losing cylinders, bad fuel?
Temperature: 7 degrees and heavy snow.
My first tow trip with the new headgaskets was supposed to be exciting. One hour into the trip, I was pumped! I could climb up hills with no fear of blowing coolant everywhere, making great time, and just HAVING a great time. Until I needed a quick top-off from half tank before I hit the freeway.
Left the truck running while I filled her up. About two gallons into the fill, I hear the exhaust whistle start to break up, like a cylinder or two dropped out. I thought, "Thats wierd!". It immediately cleaned up to a smooth exhaust note and I finished filling the truck(15 gallons were put in). Left the truck running while I went in to pay(old school truck stop). Came out and the truck was obviously down on one or possibly two cylinders. Shut it off and restarted it to a smooth exhaust. I proceed to exit the station and enter the freeway, and power dropped immediately when I began to accelerate. I made it 5 miles down the road before the truck would hardly maintain 40mph, at which point I exited and parked. I put two quarts of 911 Diesel Treatment into the tank and saw no improvement. We had a dyno appointment for my customer's car so we made that(and drove the car 2 hours each way from the truck/trailer), and returned to the truck six hours later.
Changed fuel filters which were actually pretty clean(only 5k miles on them), and no change in running condition. Loaded the customer's car up and limped back home at 30mph. We did stop back at the gas station that I filled up at and showed my displeasure. I also requested a piece of cardboard to block the grill thinking maybe the fuel is gelling before it can enter the heads. The truck came back to life for the majority of the trip! Only when I really got into the throttle hard did things get interesting. The cylinders would start dropping until I got out of the throttle, coasted, and slowly got back into it.
So, did I get a bad batch of diesel?
Cylinders started dropping during fillup;
No power when giving any throttle;
Tried 911 fuel treament, no change;
Changed fuel filters, no change;
Blocked radiator, and some of the power came back;
No DTCs or warning lights.