Bad miss and no power at first start up - Ford Powerstroke Diesel Forum
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Old 03-19-2010, 06:41 AM
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Bad miss and no power at first start up

I have searched many threads, but I have not found one that relates to my problem. When I start my truck in the morning it starts really quick (actually quicker than when the engine is hot), but has a definate miss. Even after I let it idle for about 5 or 10 minutes, it still misses and has no power until I get it to about 55mph and then after that it runs fine all day, unless I let it sit for about 4 hours. The air temperature varies between 50 and 80 degrees when I start the engine, so I don't think air temp is the problem. No CEL, oil is Delo 15-40 and motorcraft filters. I have just cleaned the EGR valve as well.
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Old 03-19-2010, 07:29 AM
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Do a cylinder contribution test with a scanner and see which cylinder is missing. I'm surprised that you don't have a CEL.
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Old 03-20-2010, 09:03 AM
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Is there anything I can check without using a computer? I hate paying someone $100 just to plug in a scan tool.
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Old 03-20-2010, 09:59 AM
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No, there isn't too much that you can do without a computer, as absolutely everything is computer controlled. You will need to check it with more than just a basic scan tool unless all you want to know is what trouble code the computer has.

For real diagnostics, you'll need something like AutoEnginuity® - OBD2 Scan Tool - Professional PC and PDA Diagnostics with the Ford add-ons.
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Old 03-20-2010, 11:12 AM
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I have the same problem with my 06. Starts quiclky and idles smooth even when cold, but has no power and a definate miss for the first few minutes of driving regardless of the outside temp. After the truck warms up it runs ok, still seems to have a slight miss, but not as bad. This is my first 6.0 so I don't have anything to compare to, but even without the miss, I just dont see the power that everyone says the 6.0 has. I don't have any smoke upon start up, have done a buzz test, all injectors ok. Tested the FICM voltage with a scan too, 49 volts cold or hot, not losing any coolant and no codes.

I spoke to a Ford tech at the dealership, he thinks it is an HPOP problem. Spoke to a tech an a local diesel shop, they think it is an injector problem. I have removed and cleaned the EGR valve, the intake was dry inside, I jacked up the back of the truck when doing this and there was no coolant in the intake. Fuel filters have been changed less than 1500 miles ago, as well as oil and oil filter.
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Old 03-20-2010, 09:41 PM
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I think that the next step would be to do a cylinder contribution test.
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Old 03-21-2010, 03:57 PM
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I have problems like that on my 03. I do have an injector or two laying down on the job until it warms up. Also the turbo puts back pressure on the engine, to warm it up, and that feels like a miss. I am going to get oil additives to wake up the injectors earlier. Hope that gets it.
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Old 07-25-2010, 07:18 PM
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my 06 does the same thing. if i try to drive it right after i start it in the mornings it misses until the temp gauge gets to the middle then it smooths out and runs fine... no power loss once it warms up, and no engine codes. i'm taking it to the dealership this week for diagnostics so i'll let you know what they say is the problem. hope its an easy fix like a reflash
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Old 07-26-2010, 04:56 PM
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Quote:
Originally Posted by bellot8670 View Post
my 06 does the same thing. if i try to drive it right after i start it in the mornings it misses until the temp gauge gets to the middle then it smooths out and runs fine... no power loss once it warms up, and no engine codes. i'm taking it to the dealership this week for diagnostics so i'll let you know what they say is the problem. hope its an easy fix like a reflash
Make sure they scan the truck when it is cold since the problem only happens when ithe engine is cold.
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Old 07-26-2010, 07:18 PM
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yeah... they told me to leave it overnight and theyd look at first thing while its cold the next day
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