engine doesn't have power/torque... tuner issue?
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engine doesn't have power/torque... tuner issue?
Got my truck back yesterday, 04 6.0... was in the shop for almost 2 months getting body work done. Truck had head studs, and egr delete. Had sct livewire tuner. I kept the tuner at my house while the truck was being worked on. When I plugged it back in, I had to reprogram it. Now the truck is slow. Barely any power, and it was very powerful and fast before. I don't even think it could go on the freeway now. Is this a tuner issue, or something else? The engine sounds fine, just can't get up there. Thanks in advance
Token Redneck
Joined: Jun 2007
Posts: 9,339
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From: Breckenridge, TX
Is it not boosting correctly? A seized unison ring in the turbo would cause that, sitting for a couple months would increase the chance of it.
What does your VGT% do? If it's consistently pegging to 85% then that's likely what the issue is.
What does your VGT% do? If it's consistently pegging to 85% then that's likely what the issue is.
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Expensive fix?
Super Moderator
Joined: May 2004
Posts: 29,380
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From: Central Coast of CA
Well, how does it run on the stock programming, when you remove the tune? That will answer your question right there. 
Stewart
Stewart
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Thanks guys... got it figured out. When it reprogrammed, I didn't put it back to performance and didn't realize. I knew it was with the tuner. Silly mistake... I just didn't realize.
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