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Old 02-09-2014, 03:30 AM
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Boost...

What kinda psi should my stock 7.3 be pushing? The max I've gotten is 8. Just doesn't seem right to me.

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Old 02-09-2014, 03:36 AM
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You should be in the ballpark of 20 psi.

There are many factors in low boost. You need to check for boost leaks, major up pipe leaks, stuck ebpv. When I had a low boost condition it was because my ebpv had chucked the clip and the butterfly was free to move.

How does your turbo sound? Nice clean whine or is it more like an air hose in your exhaust
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Old 02-09-2014, 04:02 AM
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You can't even hear it. I'll check all that later this afternoon. The only time you can hear it is when the truck is at a high rpm and a low gear and you let off and it blows off

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Old 02-09-2014, 04:08 AM
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Okay so it just isn't building it.

You need to check for significant exhaust/boost leaks
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Old 02-09-2014, 04:12 AM
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What's the best way to check boost leaks?

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Old 02-09-2014, 05:16 AM
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Get a boost leak detector to check the intake side of things, and get up under the truck and shine a light on your up pipes to see if there is any soot collected near the top of them where they meet the collector before the turbo.
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Old 02-09-2014, 06:04 AM
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Best I got from a stock truck was 16 psi... but you still have issues to look for. Have you pulled the intake tube to look at the turbo wheel fins? Are the edges nice and sharp or rounded and/or jagged? Worth checking...

However... if you can't hear it whining it does sound like a 'drive' issue more than a 'compressor' issue.

Uppipe leaks are common... soot on the firewall and bellhousing is what you will see.

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Old 02-09-2014, 10:51 AM
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Both sides of the wheel housing are leaking oil. The line on the wastegate is soaked in oil. And fins look ok. And then all the intercooled lines I believe on top of the valley are soaked in oil.

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Old 02-09-2014, 11:17 AM
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could be leaking from turbo, pedestal/ebpv actuator and the boots are probably soaked from ccv venting into the intake.
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Old 02-09-2014, 11:41 AM
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See I also Dont know all those parts.... I know what they are. Just not where they are.

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