2018 WRX jumpy turbo psi

mems3 · 06-07-2023, 02:17 PM

Hi everyone! My wrx2018 is a beast works marvelously up to about 13- 15 psi. When I floor it the needle calmly rises until it reaches around 15 psi where it then starts to jump between 12 psi and 20 psi and a loss of power is felt.

What say you?

* Registered users of the site do not see these ads.

desertrat505 · 06-07-2023, 03:18 PM

sounds like a boost leak; check for a cracked tubo inlet, intercooler coupler hose clamps, charge pipe hose clamps. It's a start.

mems3 · 06-08-2023, 02:27 AM

Thanks

mems3 · 06-08-2023, 02:27 AM

You are saying it could be the intake part of the turbo? Do these symptoms exclude the downpipe exhaust section?

EvaUnit01 · 06-08-2023, 11:28 AM

From my experience, boost leaks/spikes like that will start in the intake track. I would start at the intake box and work down to the turbo inlet, then from the charge pipe all the way up to the TMIC and throttle body.

On the FA, the most notorious thing to fail is the turbo inlet since it's made of plastic. You have a 2018 so it's been through a lot of heat cycles.

06-07-2023, 02:17 PM	#1
mems3 Scooby Newbie Member#: 188617 Join Date: Sep 2008 Chapter/Region: PRSIC Location: San Juan, Puerto Rico Vehicle: 2008 WRX Sedan OBP	2018 WRX jumpy turbo psi Hi everyone! My wrx2018 is a beast works marvelously up to about 13- 15 psi. When I floor it the needle calmly rises until it reaches around 15 psi where it then starts to jump between 12 psi and 20 psi and a loss of power is felt. What say you? * Registered users of the site do not see these ads.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

06-07-2023, 03:18 PM	#2
desertrat505 Scooby Newbie Member#: 526234 Join Date: Aug 2021	sounds like a boost leak; check for a cracked tubo inlet, intercooler coupler hose clamps, charge pipe hose clamps. It's a start.

06-08-2023, 02:27 AM	#3
mems3 Scooby Newbie Member#: 188617 Join Date: Sep 2008 Chapter/Region: PRSIC Location: San Juan, Puerto Rico Vehicle: 2008 WRX Sedan OBP	Thanks

06-08-2023, 11:28 AM	#5
EvaUnit01 Scooby Newbie Member#: 511379 Join Date: Feb 2020 Location: Philadelphia Vehicle: 2019 WRX Dark Grey Metallic	From my experience, boost leaks/spikes like that will start in the intake track. I would start at the intake box and work down to the turbo inlet, then from the charge pipe all the way up to the TMIC and throttle body. On the FA, the most notorious thing to fail is the turbo inlet since it's made of plastic. You have a 2018 so it's been through a lot of heat cycles.