Join Date: Feb 2010
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03 surge at highway speeds
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.