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O2 dump stuck open / no boost

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Old Sep 7, 2015, 01:53 PM
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O2 dump stuck open / no boost
I just finished getting the engine swap completed on my evo 8 and I go to start it up and the O2 dump is stuck open and I have no boost.
I checked all of the inter cooler pipes and all of the clamps are tight. I am really at a loss here.
I need to get a new egr solenoid because 1 of the plastic nipples broke off, so I have a coupler joint the 2 vacuum lines together right now.
I'm so close to driving this car for the first time in almost a year if I could just get this O2 dump problem fixed. I separated the O2 housing from the hot side today and the divided gasket is fine and I tightened down all 5 bolts with new hardware and lock washers.
Anybody have any ideas?
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Old Sep 7, 2015, 02:46 PM
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02 dump open = wastegate not working. it sounds like the actuator is broken. you may need to replace it.
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Old Sep 7, 2015, 03:30 PM
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Originally Posted by kaj
02 dump open = wastegate not working. it sounds like the actuator is broken. you may need to replace it.
OK thanks
I'll see if i can borrow my friends...
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Old Sep 7, 2015, 03:35 PM
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yeah I would agree with Kaj. I had a similar issue where I forgot to put in a metal ring in my new wastegate and it was stuck open due to that. What wastegate do you have?
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Old Sep 7, 2015, 04:05 PM
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Originally Posted by InoNothingMR
yeah I would agree with Kaj. I had a similar issue where I forgot to put in a metal ring in my new wastegate and it was stuck open due to that. What wastegate do you have?
It appears to be an OEM 9 Wga......
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Old Sep 8, 2015, 06:55 PM
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Bump for help....
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Old Sep 8, 2015, 07:11 PM
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You have to let is know what you found first.
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Old Sep 9, 2015, 04:10 AM
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I'll report back after I try the different waste gate I borrowed last night.
Thanks
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Old Sep 9, 2015, 06:04 AM
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The flapper my also be getting wedged on the O2 housing gasket and getting stuck as well...
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Old Sep 9, 2015, 06:24 AM
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Do you have an VIII, or a IX turbo on there?
Last edited by sparky; Sep 9, 2015 at 06:28 AM.
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Old Sep 9, 2015, 10:39 AM
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Originally Posted by sparky
Do you have an VIII, or a IX turbo on there?
It is a 9 turbo..
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Old Sep 9, 2015, 10:43 AM
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Wastegate actuator is definitely the first thing to check out.
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Old Sep 9, 2015, 10:44 AM
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Originally Posted by Fast_Freddie
The flapper my also be getting wedged on the O2 housing gasket and getting stuck as well...
I had the car running and removed the Wga rod and was able to move the flapper freely by hand and it wasn't getting stuck...
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Old Sep 9, 2015, 10:54 AM
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Originally Posted by Ude Lose
I had the car running and removed the Wga rod and was able to move the flapper freely by hand and it wasn't getting stuck...
When you removed the O2 housing, did you leave the actuator attached? You should be able to see if it's stuck open from the get go without any pressure to the actuator.
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Old Sep 9, 2015, 02:14 PM
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Originally Posted by bboypuertoroc
When you removed the O2 housing, did you leave the actuator attached? You should be able to see if it's stuck open from the get go without any pressure to the actuator.
I removed the Wga all together before removing the O2 housing. I removed the exhaust manifold the hot side and the O2 housing all in one piece with the turbo still in the car.
Does the turbo have to sit in the hot side in any particular orientation?
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