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Old 05-11-2012, 10:30 AM
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Boost surge

Hey guys I have a 03 6.0 I'm currently in the middle of studding it and deleting it, it also has a 4 in turbo back straight pipe air raid intake and bully dog power hound chip. But enough about that before I tore it down the boost would drop up and down rapidly I was wondering if my bad egr cooler would cause this or fuel filter. Any help is appreciated. Devin
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Old 05-11-2012, 10:51 AM
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Under what circumstances did this happen? Crusing, during shifting, accelerating, etc.?
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Old 05-11-2012, 11:26 AM
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Cruising. it builds boost just fine it will hit 32psi wot. Egr valve?????

Last edited by devster55; 05-11-2012 at 11:33 AM.
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Old 05-11-2012, 02:05 PM
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Check for boost leaks. Check out your turbo you could have sticking vanes.
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Old 05-11-2012, 03:00 PM
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The boot that goes from turbo to intercooler has small cracks
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Old 05-14-2012, 12:27 AM
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Bump anyone I'm just about done putting it back together.
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Old 05-14-2012, 05:53 PM
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You probably have sticky vanes in your turbo, the same has been happening to me for a while. I believe the problem is sometimes it will overboost and the VGT actuator will try to move the vanes to create less boost. And since the vanes can't get to there correct position it will buck and surge, losing boost and slowing the truck. If you had a leaky egr cooler, the moisture could help cause the problem of sticking vanes, but I'd say clean you turbo....there's a few g
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Old 05-14-2012, 05:54 PM
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......ood threads on how to take apart and clean your turbo
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Old 05-14-2012, 09:49 PM
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I cleaned it so we will see what happens
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Old 05-19-2012, 11:51 PM
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It's fixed got 2 psi more out of it
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