03 surge at highway speeds - Ford Powerstroke Diesel Forum
 
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post #1 of 8 Old 06-23-2013, 03:24 PM Thread Starter
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03 surge at highway speeds

Hey all,
I've been fighting a surge on my 03 6.0 for a few weeks now and I can't seem to pin point it. The truck has roughly 135k miles. It rarely does it under 40 MPH but from 55 MPH+ it really shows itself especially at cruise speeds. At WOT it doesn't happen and the truck idles just fine. I cleaned the EBP sensor and tube, the egr valve and the turbo thinking that the veins might be sticking. After I cleaned the turbo I thought that everything was fixed until I got on the highway and hit 60 mph and let off. The sound it makes is a very loud "fap, fap, fap" until I let off or hammer the throttle. It sounds like I'm getting buzzed by an apache helicopter going down the freeway.
Does this sound familiar to anyone?? I don't own a scanner but I'm thinking about getting a scanguage 2 or an edge insight so I can see whats going on inside the hog.
I also should add that I don't drive the truck everyday. Sometimes not for a couple weeks at a time because I'm out of town a lot for work and I carpool quite a bit when I am home.

There was a bit of wear on the unison ring where that actuator arm sits but other than that the inside of the turbo looked good.

2003 F-350. 6.0 PSD. Stock for the most part. 2.5" w/315 Toyo Open Countrys.
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post #2 of 8 Old 06-23-2013, 08:34 PM
Fill it up again Dummy
 
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May be as simple as a bad ICP???

Go pick up that ScangaugeII or whichever your liking and see what it's doing. Personally I think you should have some sort of gauges in the truck regardless.


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post #3 of 8 Old 06-24-2013, 08:28 PM Thread Starter
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That's kind of what I've come to realize. Have you played around much with the autoenginuity stuff? I'm not sure if I should go that route or with the scanguage. I definitely agree though, gauges are cheap insurance which is why the scanguage setup would be nice.

2003 F-350. 6.0 PSD. Stock for the most part. 2.5" w/315 Toyo Open Countrys.
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post #4 of 8 Old 06-24-2013, 08:46 PM
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I would lean toward ICP sounds very similar to when mine was failing. With a scan tool i could see a spike in ICP desired. ICP actual would remain constant.


ignore this i glanced through your original post>>>>>> read my 2nd post

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post #5 of 8 Old 06-24-2013, 08:48 PM
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If your hard on the throttle and suddenly let off you will get reverb in the intake tube from the aircleaner. Is excess pressure built up that has no where to escape, commonly known as a turbo fart

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post #6 of 8 Old 06-25-2013, 04:37 PM Thread Starter
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Quote:
Originally Posted by roche837 View Post
If your hard on the throttle and suddenly let off you will get reverb in the intake tube from the aircleaner. Is excess pressure built up that has no where to escape, commonly known as a turbo fart
It goes away at WOT or if I let off. It really shows itself when cruising at midrange on the highway.

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post #7 of 8 Old 01-20-2014, 06:35 PM Thread Starter
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UPDATE: Was just thinking about this. I hate it when people leave these things open ended when I'm looking for good info. Turned out to be one dead injector and two that were on there way out the door. Must have been like this for a long time because in the 4 years I've owned the truck its never ran as good as it has since this fix. Also did the blue spring upgrade to bump up the fuel psi and hopefully avoid this same problem in the future.

2003 F-350. 6.0 PSD. Stock for the most part. 2.5" w/315 Toyo Open Countrys.
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post #8 of 8 Old 01-20-2014, 08:03 PM
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I was about to hop in and say injectors or injector wire harness. I had a very similar issue and the harness was to blame.


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