Compression Ignition Addict
Join Date: Jan 2009
Thanked 154 Times in 136 Posts
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Weird one but I did a google search and found many people experiancing the same problem, but nobody posted a fix.
The deal is towing heavy, level to slight uphill, only in OD or maybe one gear below, about 55-70 mph right about 2k rpm my turbo was de-boosting
So I would be going along normal, all good, 2k rpm 25 psi boost, 950-1000 EGT, steady state cruising, then once in awhile, always in the same general parameters listed above, the turbo would wind back, which i could hear and on the boost gauge it would drop steady right to 15psi and hold, the EGT would immediately start climbing, up towards 1300, could not feel any real loss of power, and then when the EGTs got to about 1300, the boost gauge would rocket up to 34 psi and hold for about 2 seconds, then settle back at 25-28, and the EGTs would come back down, and all would be normal until the next time.
Like i said i found others with the exact same issue, but nobody posted a fix. It sounds like an EGR issue maybe, but My setup right now is gogo intake, where there is no separation of the intake for the EGR, the valve just sits down in a huge hollow empty intake, and my Tow Tune has it "programed" off also. So I dont know, weird. Besides that the truck runs fine, leaks nothing. I am going to try to just unplug the egr valve and see if that does anything, I only had it plugged in cause I have heard of dudes having less power unplugged, but I will try it. Then after that I am going to go back to stock tune and see if it does it. I tried loading two different towing tunes I had though, and it did it on both. Any thoughts? thanks guys.
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