Bucking / jerking when cold - Ford Powerstroke Diesel Forum
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Old 11-08-2012, 05:01 PM
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Exclamation Bucking / jerking when cold

I have a 2006 f250 with h&s mini max programmer, EGR delete, airraid intake and straight pipe exhaust. When it's cold and I'm initially taking off it sounds like it is miss firing and when i get up to high way speeds it starts to buck on me kinda violently but quits after the engine warms up. I've read a few forums and some say it could be gunk on the injectors or something called stricktion and a lot of them say to use an additive and it should work. I just really need some professional advice!!!!
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Old 11-08-2012, 05:51 PM
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WELCOME i see this is your first post! i think before calling any injectors bad i would have a look at your ficm voltage!! 48 is great it should not drop below 45 rule of thumb for me!! these usually cause cold start issues like this!
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Old 11-08-2012, 06:05 PM
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^^^^ What he said.

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Old 11-08-2012, 06:05 PM
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What kind of oil do you use? If the FICM checks ok and you use 15w40 oil, change the oil to 5w40 and add 2 bottles of Rev-X for the injector stiction. Make sure you use Motor Craft filters.
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Old 11-08-2012, 06:06 PM
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Thank you i just looked up a video that showed me how to test ficm. I will give it a try tomorrow.
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Old 11-08-2012, 06:09 PM
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I will also try that too! Where do you get Rev-X at and why does 15 w40 effect the motor like that.
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Old 11-08-2012, 06:15 PM
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15w40 is a thicker oil and the oil is what fires the injectors + being a "dino" oil it alllows more build up inside the injectors than 5w40 synthetic.
REV-X Oil Additive | Diesel Fuel Additive | High Performance Oil
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