6.0 boost problems
Fleet Mechanic
Joined: Jul 2013
Posts: 1,402
Likes: 114
From: Tuscaloosa, AL
Are you sure you're reading psi and not another unit of pressure?
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Junior User
Joined: Feb 2014
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Unless I am badly mistaken, the turbo, has nothing to do with reading 20 psi boost without the engine running. It has to be in the wiring. Electrical gremlins can be the worst to find, but are usually low cost repairs. I'll see if I can findmy pcm connector diagrams and post them. That will tell you with pcm wires go to the ebp sensor. Debugging starts there. Maybe Rusty or Sean will post them I know those guys know where they've filed them on their computer.
Are you sure you're reading psi and not another unit of pressure?
Are you sure you're reading psi and not another unit of pressure?
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Junior User
Joined: Feb 2014
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Boost is reading perfectly fine. Ebp sensor is reading high. With ebp plugged in I register boost on gauge, but truck just jumps wanting to take off but it won't.... And it's very jumpy... Not drivable like this... With ebp unplugged it will only build about 5psi of boost ebp (21.14 I think) and truck doesn't jump at all and runs much smoother... It just won't build up anymore power. Still takes forever to get up to speed
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Junior User
Joined: Feb 2014
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Hey guys after some research I've found that a lot of people with the sct tuners report ebp readings similar to mine
Apparently this means my ebp is reading normal just sct problems in the code... I guess this narrows things back down to the turbo... Should I try to $125 garret rebuild kit? I'm pretty handy and can get the turbo out or in in about 20 mins (cause I've done it so much lol). Just wondering y'all's thoughts. Thanks
Apparently this means my ebp is reading normal just sct problems in the code... I guess this narrows things back down to the turbo... Should I try to $125 garret rebuild kit? I'm pretty handy and can get the turbo out or in in about 20 mins (cause I've done it so much lol). Just wondering y'all's thoughts. Thanks
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Junior User
Joined: Feb 2014
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I have 5" turbo back exhaust... And I'm not getting the turbo underboost code anymore. That's only with the ebp unplugged I get that... After more driving today the trucks actually drives really got WOT after warm... A good bit of lag but once it kicks in it drives great.... Basically when speeding up from a stop, the trucks jerks forward and backwards and you can hear it in the exhaust, and then as you gradually get up to speed and the trucks gets into higher gears it becomes less and less of a problem
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Junior User
Joined: Feb 2014
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Alright guys I'm almost ready to give up. I pulled the turbo to rebuilt it because I knew the oil seal was leaking, thus causing my white smoke out the exhaust... So I ordered a upgraded rebuild kit with a 360 thrust bearing and all that stuff from a diesel shop. I followed instructions precisely online. Reinstalled the turbo and now no boost... Nada, 0. Gauges doesn't move off 0 at all on my sct x4... However when the truck is running and I un plug the pig tail going into the turbo I hear it cut off, and when I plug it back in it comes back on... The VGT duty cycle is changing in the truck and I cleaned all that very well so I know it's not sticking. Also there is a lot of black smoke on accelerating, and no power what so ever... I think the exhaust back pressure problem is completely un related to my turbo problem... The turbo also has a good bit of smoke coming out from around it after driving the truck... Could possibly be oil that was on it, or I messed something up on the inside... Please help
Fleet Mechanic
Joined: Jul 2013
Posts: 1,402
Likes: 114
From: Tuscaloosa, AL
Alright guys I'm almost ready to give up. I pulled the turbo to rebuilt it because I knew the oil seal was leaking, thus causing my white smoke out the exhaust... So I ordered a upgraded rebuild kit with a 360 thrust bearing and all that stuff from a diesel shop. I followed instructions precisely online. Reinstalled the turbo and now no boost... Nada, 0. Gauges doesn't move off 0 at all on my sct x4... However when the truck is running and I un plug the pig tail going into the turbo I hear it cut off, and when I plug it back in it comes back on... The VGT duty cycle is changing in the truck and I cleaned all that very well so I know it's not sticking. Also there is a lot of black smoke on accelerating, and no power what so ever... I think the exhaust back pressure problem is completely un related to my turbo problem... The turbo also has a good bit of smoke coming out from around it after driving the truck... Could possibly be oil that was on it, or I messed something up on the inside... Please help
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Junior User
Joined: Feb 2014
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^^^ I'll check on that tomorrow... Yeah pretty sure it's tight but always a possibility... Still wouldn't explain the smoke around the turbo.
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Junior User
Joined: Feb 2014
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Would this cause an absolute zero boost?