early 99 carbureted diesel? - Ford Powerstroke Diesel Forum
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Old 10-17-2013, 08:50 AM
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early 99 carbureted diesel?

I have an early 99 with 210k that someone who didn't know better would swear was carbureted lol. I have 6637 intake, stock straight pipe exhaust, and dp tunner but have the same problem with or without tuner. I can crank the truck and it idles smooth runs great for about two miles when I slow down to stop after that the truck lopes and idles rough then at low throttle cuts out and shakes. I can put the truck in park and sometimes it will all clear out other times I need to either rev the engine a time or two (almost like after you crank an old worn out carbureted pickup) or drive over 65mph for a couple miles. Once I get it all cleared, the truck is great until it sits several hours then we start all over. I found oil on the ICP so should have one of those the next day or so. Is this possibly my problem or where else should I be looking? Also, the truck does not smoke (other than black smoke with the tuner) and I have never had to plug it in to start.
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Old 10-17-2013, 10:05 AM
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Change your oil lately?
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Old 10-17-2013, 12:44 PM
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The ICP sensor is a good place to start. If it's still acting up after you replace it, make sure your oil is not too old and your fuel filter isn't clogged.
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Old 10-17-2013, 01:40 PM
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Oil and fuel filter have less than 200 miles on them
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Old 10-17-2013, 05:50 PM
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Changed the ICP and no improvement. Forgot to mention the local dealership checked it also no codes and they said buzz test and compression are good but they "think" it is injector issues? I'm not convinced if they were bad shouldn't it run bad all the time or at least be smoking and hard to start? Advice on where to go to next?
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Old 10-17-2013, 06:09 PM
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Cold injectors can cause the exact issue you are explaining.

How many miles on the truck?
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Old 10-18-2013, 05:28 AM
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Could the valve cover harness plug shaking loose cause cinda the same problem?
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Old 10-18-2013, 10:20 AM
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210k miles. I think it's a little too consistent to be uvch?
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icp, idle, lope, smoke, tuner

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