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Message: [QUOTE="Copracr, post: 435125, member: 4257"] I'd like to start a thread to try and get my truck running tops. Here's what I have: First off, low boost. I've had my truck 40k miles and i've never been over 7-8psi. I always assumed it was the up pipes leaking and the spider leaking. While the engine was out 5k ago I replaced the up pipe donuts and got the spider on perfect (double checked). Still only making 7 psi at WOT. When driving at part throttle it behaves normal and will shoot up to 7 psi but when it gets there it's like the gause is broke and it just stops at 7. I did try another gauge. When it's WOT I can hear a lot of air escaping noise. I unplugged the wastegate vacuum line to no effect, and pressure test found a missing o-ring between the turbo and spider - replaced to no effect. My EBPV was deleted from the pedestal and the valve wired open while the motor was out - to no effect. I replaced the EBP tube because it was completely blocked off, but I didn't replace the sensor. I assume it's crudded shut though. Not sure that can cause my problem so I havent fooled with it any further. My turbo looks ok on both sides with no sideplay. My K+N looks dirty and I'm thinking I should pull it and see if that helps. My second problem is my EGT's (measured in the driver side manifold). at idle its around 400, light cruising around hits about 800, but on long highway inclines it can get 1100/1200 on steep grades. Boost at flat cruise around 70 is 4-ish but when it pegs at 7psi the EGT starts climbing. If I get more boost will this lower my EGT's? I have a snap on mt2500 brick but i'm not sure what to check next. I ordered some tunes for it but I'm not excited about installing them on a broke engine. Sorry for the long post and thanks for any assisstance. [/QUOTE]