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S280 and ZERO boost!

wcnST

wcnST

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#1
Had the turbo in since last December, Car has ran AWESOME this entire time. Its my daily and WELL TAKEN CARE OF!!!! Drive awesome home from work Friday. Didnt drive it saturday and went out Sunday and NO BOOST, Got in to it and found the rod on the wastegate loose and ultimately broken and stuck open. I did do the wastegate upgrade with the turbo so I still had the original wastegate from the turbo upgrade (comes with the standard) so we threw that in. It seemed to fix it for a second but right back to it. Reflashed the whole nine.... I am at a loss. Wastegate issues for ever?
 


Dpro

Dpro

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wcnST said:
Had the turbo in since last December, Car has ran AWESOME this entire time. Its my daily and WELL TAKEN CARE OF!!!! Drive awesome home from work Friday. Didnt drive it saturday and went out Sunday and NO BOOST, Got in to it and found the rod on the wastegate loose and ultimately broken and stuck open. I did do the wastegate upgrade with the turbo so I still had the original wastegate from the turbo upgrade (comes with the standard) so we threw that in. It seemed to fix it for a second but right back to it. Reflashed the whole nine.... I am at a loss. Wastegate issues for ever?
Click to expand...
sounds like your wastegate is sticking open possibly broke the rod because the vacuum was trying to actuate it and it would not move . How the hell that would happen though is beyond me. How many miles on the car?
 


OP
wcnST

wcnST

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80k miles. New wastegate and went right back to zero boost.
 


Dpro

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wcnST said:
80k miles. New wastegate and went right back to zero boost.
Click to expand...
Actuator or wastegate itself . You probably mean new actuator . The actual wastegate is a metal door in the exhaust housing section of your Turbo that relies of the actuator to hold it closed until it is pushed open by the actuator which is controlled by vacuum . Functioning properly it opens up to release boost pressure at a certain psi so you do not damage the Turbo. Was your gas mileage bad before this happened ? That’s one of the signs of failure.
 


arlisscm

arlisscm

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When you say zero boost, do you literally mean no boost at all or just low boost? Even with the wastegate fully open, I doubt the wastegate port flows enough for the turbo to make zero boost. If you actually have zero boost, the broken wastegate may be a symptom of a larger problem. Did you check that the wastegate arm moves freely and completely when you swapped actuators? Also, can you hear any induction noise from the turbo?
 


OP
wcnST

wcnST

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No turbo noise at all but it does spin. So the wastegate was stuck open. We got it to close but then the arm came off. So we took the wastegate off and put the stock one back on made sure everything "worked" and when we fired it up you could hear the turbo like before. Pulled out of the drive way and no boost again. So negative booost to 0.0 on the gauges is it.
 


arlisscm

arlisscm

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May need to pop the downpipe off to get a look at the turbine side of the turbo. I don't know how it could do so, but maybe the cap on the wastegate flap came off or is loose? Basically leaving the wastegate passage fully open all the time.

1726599102480.png
 


TyphoonFiST

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Need to take off the DP and visually inspect the Turbine on the Turbo and then use a Vacuum pump on the Wastegate actuator to see if it will Push the wastegate open at the Psi specified for the actuator.
 


Last edited:
dhminer

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Just echoing the good advice above. You have a compressor to push air into the wastegate actuator vacuum line to mimic boost operating it?
 


OP
wcnST

wcnST

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Update: the rod in the waste gate actuator stripped out and came clean out. New actuator with lots of red loktite and we are back to the beast it was/is. I constantly think about getting/needing a bigger car but nothing is as fun to drive.
 


arlisscm

arlisscm

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So, the uprated wastegate actuator broke, you switched to the original S280 actuator and that rod stripped? Is that correct?
 


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