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Old 08-04-2014, 05:19 PM   #1
Scooby Newbie
Member#: 367986
Join Date: Sep 2013
Chapter/Region: South East
Location: Florida
2002 Subaru WRX

Default Dyno tune

Hey, i recently upgraded to the 16g turbo and i went to get a tune today at Pros Tuning. The guy was having major problems holding the boost. It kept spiking and overboosting. He ended up taking a manual boost controller from a evo and put it on. At minimum, he can only put it at 21psi. No less. We wanted to do 19 and with that manual boost controller, it held boost it was smooth. He finished at every traffic light, the car was idling real bad. It will spike from 200rpms-500rpms. It felt like it was going to stall. I called them, they said theres a vaccumm leak. I checked all hoses and i don't hear any leaks. When i got to work. I turned the car on to accessory mode and the car was acting weird. Turned the car on, the check engine light was flashing and the car was idleing bad and i checked the codes. 6 codes about o2 sensors and starting set time and idle **** and wheel speed sensor. I didn't even erase the codes. I turned the car off then back on. Check engine light went away and the car idled fine.
Any ideas? Is the car just trying to get used to the tune? Do i check for something? It's a 02 wrx 2.0L.
P.s. The car got 305awhp/277fttq

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Pjn826 is offline   Reply With Quote
Old 08-04-2014, 05:54 PM   #2
Scooby Newbie
Member#: 221945
Join Date: Aug 2009
Default Dyno tune

You need another tuner! Check with the members of your regional forum for recommendations.
RexWagonWA is offline   Reply With Quote
Old 08-04-2014, 08:27 PM   #3
Scooby Specialist
Member#: 279525
Join Date: Apr 2011
Location: QUEENS NY
04 rex luger!


The rough idle/ stalling sounds like a vacuum leak, and by the way you describe this whole event, it seems like you have no idea how to find the leak if you had one.

Go to the shop that tuned your car and simply ask them to give u a vac/boost leak test. Should've been the first thing you did before getting tuned. Good luck.

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Old 08-05-2014, 03:33 AM   #4
Uncle Scotty
Scooby Guru
Member#: 16200
Join Date: Mar 2002
OK Houston
we have an Uncle


its really a wonder that more of these arent blown up more often than they are.......
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Old 08-05-2014, 09:21 AM   #5
GTR Fever
Scooby Newbie
Member#: 378021
Join Date: Jan 2014

Do you have a boost gauge? Can check the vacuum pressure on idle..that normally helps identify a vacuum leak.

But the problem does sound like a tuning issue, get it back and have them check it or get another tuner
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Old 08-05-2014, 10:15 AM   #6
Scooby Specialist
Member#: 29292
Join Date: Nov 2002
Chapter/Region: SCIC
Location: Orange County CA
2004 WRX wagon


I would say do a log, that will let you know what is going on with the engine. what brand is the turbo?
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Old 08-08-2014, 02:05 AM   #7
Scooby Newbie
Member#: 79476
Join Date: Jan 2005
Chapter/Region: NWIC
Location: Stanwood, WA
2004 WRX Wagon 18G
Tim Bailey tuned 298WHP


Sounds like the mechanical adjustment on the wastegate needs to be checked as well. Mine was too tight and was causing boost creep when I first installed it.
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