Wastegate Failure?
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Cross-Country
Joined: Sep 2007
Posts: 63
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Wastegate Failure?
I have a Superchips programmer, i keep my truck tuned most of the time...
I am experiencing power loss noticeable to me only when pulling my trailer, i always pull it when returned back to stock tuning.
before I brought the truck to the repair shop last night to leave it with them, i returned her to stock, but checked the codes first, i had the "p1249- Wastegate Failed Steady State Test" code. I didn't clear the code, but it is not showing any codes for them this morning, they called me and said they can't find anything wrong. I told them about the code i had, and they are researching further.
My question is would the wastegate problem cause this loss of power, and would it show up all the time, or in stages...I have 18lbs of boost pressure the tech said.
I am experiencing power loss noticeable to me only when pulling my trailer, i always pull it when returned back to stock tuning.
before I brought the truck to the repair shop last night to leave it with them, i returned her to stock, but checked the codes first, i had the "p1249- Wastegate Failed Steady State Test" code. I didn't clear the code, but it is not showing any codes for them this morning, they called me and said they can't find anything wrong. I told them about the code i had, and they are researching further.
My question is would the wastegate problem cause this loss of power, and would it show up all the time, or in stages...I have 18lbs of boost pressure the tech said.
Postmaster
Joined: Apr 2004
Posts: 3,658
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From: Ellensburg, Washington
If the wastegate failed then yes you would see a loss in power....
I would do as Dan suggested and try towing with out a tune and see if the code rears its ugly head again.
Cowboy Steve
I would do as Dan suggested and try towing with out a tune and see if the code rears its ugly head again.
Cowboy Steve
Postmaster
Joined: Jun 2006
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From: Fulltime RVer
How can a wastegate fail? It's spring loaded in the closed position, and requires boost pressure to open. Grab the actuator rod and push it in the direction of the turbo. It shouldn't move unless you grab it with vise grips and push pretty hard.
Post Fiend
Joined: Feb 2007
Posts: 7,191
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From: Blairsville,Ga
Originally Posted by ernesteugene
How can a wastegate fail? It's spring loaded in the closed position, and requires boost pressure to open. Grab the actuator rod and push it in the direction of the turbo. It shouldn't move unless you grab it with vise grips and push pretty hard.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
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From: Rio Rico, AZ.
Originally Posted by ernesteugene
How can a wastegate fail? It's spring loaded in the closed position, and requires boost pressure to open. Grab the actuator rod and push it in the direction of the turbo. It shouldn't move unless you grab it with vise grips and push pretty hard.
It's pretty easy to see how you would lose boost without the valve in place.
This turbo is off of a VW 1.8t gas engine.
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Postmaster
Joined: Jun 2006
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From: Fulltime RVer
Originally Posted by ernesteugene
How can a wastegate fail? It's spring loaded in the closed position, and requires boost pressure to open. Grab the actuator rod and push it in the direction of the turbo. It shouldn't move unless you grab it with vise grips and push pretty hard.
As a "fail safe" to prevent excessive boost, the wastegate control system is designed so that if the control solenoid fails or it loses its PCM control signal, the full level of intake manifold boost is routed directly to the actuator nipple.
I once did an experiment of hooking up a rubber hose to directly connect the fitting on the intake manifold to the nipple on the actuator. The maximum boost you can get is about 10 to 12 psi at WOT. This test will check the actuator diaphragm action, and the spring tension. If a truck doesn't have a boost gauge, this is a good SOP way to see if the waste gate control system is working. If it feels the same with the hose bypassing the solenoid there's a problem with the control system.
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Fleet Owner
Joined: Jun 2004
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From: Rio Rico, AZ.
Originally Posted by ernesteugene
I once did an experiment of hooking up a rubber hose to directly connect the fitting on the intake manifold to the nipple on the actuator. The maximum boost you can get is about 10 to 12 psi at WOT. This test will check the actuator diaphragm action, and the spring tension. If a truck doesn't have a boost gauge, this is a good SOP way to see if the waste gate control system is working. If it feels the same with the hose bypassing the solenoid there's a problem with the control system.
Posting Guru
Joined: Aug 2007
Posts: 1,852
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From: Sonoita Hills, AZ
When I installed the hypertech and larger exaust and K&N, I started getting that error. I then installed a BD wastegate actuator and problem has been gone for 75k, never rearing its ugly head again. They say the original waste gate won't hold up to all the mods, spring gets weak and it flops in the (turbo)wind.
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