COLD WEATHER SURGING - Diesel Forum - TheDieselStop.com
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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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Old 02-09-2011, 04:26 PM   #1 (permalink)
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COLD WEATHER SURGING

When the temperature outside is around 45 or lower when the engine is cold my truck surges for abotu 20 seconds then it evens out and runs smoothly. when I use the block heater there is no problem. Any ideas on what could be causing the surging problem. FYI, I am going to have the egr delete kit installed and a bigger oil cooler installed in a week. I have 86000 miles and it a 2003 model.
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Old 02-09-2011, 05:18 PM   #2 (permalink)
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By "surges" do you mean the idle speed rises and falls irratically for the first 20 seconds or so? That is fairly typical cold-start behavior for older engines. What oil are you using?
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Old 02-09-2011, 05:18 PM   #3 (permalink)
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What kind of bigger oil cooler?
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Old 02-09-2011, 06:13 PM   #4 (permalink)
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My truck was acting similar along with having a little bit of a miss when it was cold. Dealer replaced the FICM half shell under warranty and that seems to have solved the problem at the moment.
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Old 02-09-2011, 06:18 PM   #5 (permalink)
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It is varnish building up in the oil side passages of the injectors. Hot shot secrets is the product you want to use to clean up that varnishing.
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Old 02-09-2011, 06:23 PM   #6 (permalink)
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Injector varnishing makes them stick when cold. Put in hot shot secrets. It will clear it up.
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Old 02-09-2011, 07:22 PM   #7 (permalink)
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Sorry had to step out for a while. I am replacing the stock oil cooler with one that has bigger coolant passages due to the ford coolant plugging up the egr and oil coolers.
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Old 02-09-2011, 07:23 PM   #8 (permalink)
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Thanks for the replys. I really like this site so much good information.
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Old 02-09-2011, 07:24 PM   #9 (permalink)
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Can I get this "HOT SHOT SECRETS" at any auto parts store?
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