Join Date: Jul 2009
Location: Gainesville Virginia
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Interesting... your numbers dont seem to far from mine when I had my stock exhaust. I would see the same boost pressures and about the same EGTs. and the same fluctuations. I have upgrade a couple weeks ago to a 4" MBRP Exhaust kit, and my EGTs dropped 250*. It was the best upgrade I have done so far. The truck seems to run way better and pulls my trailer(s) easier.
One thing you might want to check, see if you down pipe is loose at the turbo. When I did my exhaust I found mine to be finger tight if that! Once I got it out, you could see where it was blowing by. I have a feeling that sucker was moving around when I hit decent bumps, thus causing my weird temps. Since my exhaust upgrade, haven't seen the temps fluctuate any more. Also my boost has increased to 20-21lbs when I am pulling hard.
Check it out, or just bite the bullet and get your exhaust upgraded if you can. I got mine from Performance Truck Products and couldnt be happier. They are a vendor on here.
CC, LB, DRW (aka Fat Bottomed)
7.3 PSD, Auto
Mods: AFE Stage II Intake, MBRP 4" Exhaust w/ 5" Tip, Reflex Shocks, Hidden Gooseneck Hitch, Prodigy P3, Ford APCM, ISSPRO Boost and Pyro, Marinco Mod, Foil Delete, Energy Suspension Bushings, Glowplug LED Mod, MAXX-Lift Leveling Kit, 285/75/16 Firestone Destination A/T's
Mods in the works: Inverter and Compressed Air
Watching everyone decreasing their carbon footprint so I can increase mine!
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