Sputtering and coughing, then runs fine.?.? - Ford Powerstroke Diesel Forum
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Old 05-10-2014, 09:23 PM
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Sputtering and coughing, then runs fine.?.?

97 F-250, 7.3 turbo, automatic, all stock except for K&N air filter and bigger downpipe:

This is my first diesel so I really don't know much about them yet. I'm hoping you guys can help me. I use the truck to tow a 6200 lb. travel trailer. Today, I was towing the trailer up a mountain pass in third gear. The hill was getting steeper and the truck was lugging down to about 2000 rpms. (I think I was daydreaming and left it in 3rd too long, with too much throttle, for the steep grade.) Just when I'm thinking I should shift down to 2nd, the engine loses power and starts coughing and sputtering and knocking loudly. It sounded like it was coming from the driver's side of the engine bay, but I can't be sure. I downshifted and within a few seconds it seemed to be running normally again. Stock gauges looked normal. The truck has no pyrometer. I stopped and let it idle while I looked things over under the hood and under the truck, but didn't see anything abnormal. So I drove the rest of the way home, over three more passes, with the truck running great like it usually does. Does anyone have any ideas about what happened? Do you think I damaged something? With this engine, where should I be keeping the rpm's when pulling loads up big hills? 2500-3000 rpm's? Any advice would be appreciated.

Last edited by DougC; 05-10-2014 at 10:34 PM.
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