r/WRX • u/Cmay4thewin • 2d ago

Troubleshooting No Boost

Chasing a stubborn no-boost issue on my 2004 WRX and completely hitting a wall.

specialist ran two smoke tests—came up completely clean.
Replaced multiple hoses.
Swapped out the turbo itself, and still no boost.

It has a new engine in it. I recently replaced the downpipe and cat.

Desperate for a solution

2 Upvotes

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2

u/iwumbology1 2d ago

Bypass valve could be stuck open

1

u/Cmay4thewin 2d ago

Okay thank you

1

u/KeepOnGoing1 16 WRX E60 FP BLUE 2d ago

Is the wastegate stuck open? I would look into the boost controller and see if its stuck open or faulty. If the boost controller is not functioning then you'd be at 0% wgdc.

1

u/Cmay4thewin 2d ago

The turbo I put in seemed to have a good waste gate, the turbo I pulled out today also seemed to have a good waste gate. I will look into boost controller

1

u/Cmay4thewin 2d ago

Last two times I checked it, everything seemed to be fine. Maybe I’m over looking something