truck misses when coasting down the road - Ford Powerstroke Diesel Forum
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Old 07-31-2012, 05:05 PM
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truck misses when coasting down the road

A few months ago I had some issues with my truck. Ford said I had a few injectors bad, needed a new fuel pressure regulator and that my FICM was not communicating well with my injectors so I needed a new one of those too. I ordered the parts and a few extras, like 155 cc injectors, a 58 volt Ficm, the blue spring upgrade, an egr delete and an sct tuner. After a few months I FINEALLY got all of my parts and began to put everything back together. Afterwards all of the preexisting problems were gone, but I had a new problem. I have way more power than I thought I would and a considerable jump in feul mileage. But, after accelerating to 40+ and letting off the throttle it sounds like it is missing even trying to stall. Once I get below 35 it seems to stop, occasionally it will miss just sitting at an idle. But if i put it in gear and get a load on the engine it will go away as well. Also I have noticed the idle changes from time to time. Not alot, but from around 600 to maybe 1000. I played with the tuner a bit to see if it would change the problem. It did not so I returned it to stock and havent used it since. One mechanic told me it was fine, nothing wrong. Ford claimed it was the injectors, that I needed 8 new ones because everyone of them was falling off at one time or another. They say because they are oversize. Hopefully someone on here can get me headed in the right direction to fix this problem.
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Old 08-04-2012, 12:24 PM
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Do you have a monitor?

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Old 08-05-2012, 05:54 AM
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Just my edge insight.
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Old 08-05-2012, 06:31 AM
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What kind of icp readings are you getting, is your icp mounted under the turbo, is it oil soaked, have you updated your pigtail?

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Old 08-05-2012, 08:33 AM
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Icp on front of passenger side valve cover. No oil on it. Very clean. Not sure about the pigtail. I know i have not done it. And the only icp readins i can get are the voltage readings.
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Old 08-05-2012, 09:33 AM
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Quote:
Originally Posted by 04PS250 View Post
Icp on front of passenger side valve cover. No oil on it. Very clean. Not sure about the pigtail. I know i have not done it. And the only icp readins i can get are the voltage readings.
Ok, so you have the later model setup, usually not a many problems. Here is the link to monitoring, its worth the read so you can get the most ot of your monitor. Keep an eye on the icp readings to see if maybe that is acting up. There is a conversion for the voltage readings. Maybe your throttle pedal is acting up, I think its called the tps. IIRC. Others may chime in.

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