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Old 12-10-2012, 08:27 AM
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7.3 NO BOOST

Started the truck up this morning, decently cold, weather dipped in the single digits last night. Not plugged in. Cranked over, idled rough, no big deal. Drove for about 5 miles around 35mph, no boost what so ever. Gauge read 0 psi. I could hear a "air" sound, like when the wastegate dumps, consistently when on the gas. Truck ran like a slug.Pulled over, popped the hood, nothing catastrophic... all looked good. if I goose it in neutral I can get .1 psi..

My quick searches suggests that its the waste gate or the waste gate solenoid. I am up at school, only have access to limited tools and its finals week

I can get a circuit tester and check the solenoid, it should be closed when the truck isnt running.

Just wanted to get everyones opinion. Cant get under the hood until tomorrow afternoon.
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Old 12-10-2012, 08:44 AM
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sounds like the EBPV could be stuck closed
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Old 12-10-2012, 08:48 AM
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Quote:
Originally Posted by dalton1 View Post
sounds like the EBPV could be stuck closed
Anything diagnostic I could do? This wouldnt prevent the turbo from building boost would it?
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Old 12-10-2012, 09:09 AM
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when its stuck closed it will cause low power no boost and a air rushing noise from the exhaust.
you could try unplugging it, with the key off the ebpv should be in the open position. the plug is a 2 wire plug with a metal lock at the base of the turbo in the front.
if that dosnt work it could be full of carbon causing it to stick which would require you to disassemble and clean
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Old 12-10-2012, 09:14 AM
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The "air" sound you are hearing is a lovely butterfly valve in the exhaust system on the back side of the turbo that assists in cold weather to warm the truck up. There are a few ways around it such as a blank exhaust housing with no valve in it or you can take the housing off, and bust the valve off the shaft and let the shaft free spin when it tries to cycle on and off.
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Old 12-10-2012, 10:03 AM
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Is there a way to just unplug the ebpv actuator?
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Old 12-10-2012, 10:50 AM
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Ive seen people unplug it and seen people un hook it. There is a plug by the front side of the turbo that can be un plugged and it will disable the EBPV.
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Old 12-11-2012, 07:35 AM
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next time I started her up, all was fine. This morning, 9deg, no problems. Should I tear down the EBPV and clean it out?
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Old 12-11-2012, 08:17 AM
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As long as the valve is not physically stuck, you can unplug the connector for it down near the pedestal and it will remain open (inactive). I've had mine unplugged for about 2 years now.
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Old 12-11-2012, 10:53 AM
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Quote:
Originally Posted by sniper_101 View Post
As long as the valve is not physically stuck, you can unplug the connector for it down near the pedestal and it will remain open (inactive). I've had mine unplugged for about 2 years now.
alrighty, when I get a glimpse of warm weather ill crawl in there and un plug that sucker!
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