Only 8psi in all gears! Help! - Page 2

awd4life · 10-19-2006, 09:55 AM

try a hard reset of the ECU and reflash the RT map, i've had this happen to me twice now in the year i've been running my COBB AP. 8psi is the wastegate spring pressure, so basically it's like you aren't running any boost control and the wastegate is controlling the boost pressure. i bet the spool up is a bit slower to huh?

try that before you get pissed pulling the top mount off looking for holes or leaks, most of the time if you have a boost leak you can hear it hiss at the boost pressure it takes to push it open.

JAB06 · 10-19-2006, 06:00 PM

Same thing happened to my friends wrx last week. It was the vacuum line to the waste gate actuator, the line split apart. I would def check that out

LateBraking · 10-20-2006, 06:18 AM

Quote:

Originally Posted by JAB06

Same thing happened to my friends wrx last week. It was the vacuum line to the waste gate actuator, the line split apart. I would def check that out

I checked that line out last night and didn't find anyhting. My pressure is back up to 16.5 today. I'm looking forward to getting some new fuel in the system since I have a feeling that is the cause.

Thanks again for all the replys!

HNIC · 10-21-2006, 11:37 PM

I'm having the same problem I thought it was the line from the
t to the wg accuator. I put a new line on and a new pill in the line. No change. Theren't suppose to be two restrictor pills in the line from the turbo to the accuator? I checked the hoses they look good to me.

ArizonaSTI · 10-22-2006, 12:02 PM

try yelling at your car

LateBraking · 10-23-2006, 06:18 AM

Quote:

Originally Posted by HNIC

I'm having the same problem I thought it was the line from the
t to the wg accuator. I put a new line on and a new pill in the line. No change. Theren't suppose to be two restrictor pills in the line from the turbo to the accuator? I checked the hoses they look good to me.

I'm noticing this 8psi limit problem is intermittent. I'm ruling out bad fuel since I've been through 3 tanks now from different locations and still have this problem.

This issue happened to me 2x this weekend. I found that shutting off the car and restarting it can restore my boost. Does that give anyone an idea? I would think any vacuum leak would not be fixed by this. Bad ECU perhaps? Oh, it happens with both Stage1 and stock flashes.

crystal_Imprezav · 10-23-2006, 06:26 AM

Boost gets cut if your IAM drop below a certain value which could explain your above statement. Keep good gas from shell, cheveron, 76, and etc. and see if that corrects the issue.

HNIC · 10-23-2006, 08:51 AM

I don't think I've ever seen full boost since I owned the car. I thought it was the boost gauge but I did some data loggin for the first time with ecuedit. It's reading 7.98psi. Does it make a difference that I have a IHI VF22 turbo?

LateBraking · 10-23-2006, 11:50 AM

Quote:

Originally Posted by HNIC

I don't think I've ever seen full boost since I owned the car. I thought it was the boost gauge but I did some data loggin for the first time with ecuedit. It's reading 7.98psi. Does it make a difference that I have a IHI VF22 turbo?

So you have always had the VF22 on your STi? If you are only putting out 8psi, you are REALLY missing out on performance!

HNIC · 10-23-2006, 12:38 PM

Yeah I bought the car with it. Imagine how I felt when I found out that there is more. I still don't know that much about the VF 22, still searching. I just want to get full boost out of it right now.

LateBraking · 10-23-2006, 01:31 PM

Quote:

Originally Posted by HNIC

Yeah I bought the car with it. Imagine how I felt when I found out that there is more. I still don't know that much about the VF 22, still searching. I just want to get full boost out of it right now.

I good tuner should be able to help you get more boost.

Inertia · 10-23-2006, 05:35 PM

Go fill up with 100 octane and I mean fill up all the way drive that whole tank for daily use if the problem persists its not fuel related.

HNIC · 10-23-2006, 06:12 PM

I'm in florida I only put 93 oct. Is there a way to test the boost controller on the car?

LateBraking · 10-24-2006, 06:12 AM

Quote:

Originally Posted by Inertia

Go fill up with 100 octane and I mean fill up all the way drive that whole tank for daily use if the problem persists its not fuel related.

That sounds like a good idea. Now I have to find a place that sells that around here. Right now my car is running fine, so perhaps I'm out of the woods.

Christian. · 10-24-2006, 09:30 AM

Quote:

Originally Posted by LateBraking

Has anyone ever run into the situation where you are only hitting 8psi in every gear? It just started to happen today when I filled up with a new tank of 93 oct? Could this be bad fuel?? I'm running Cobb Stage 1, 93 v1.10. I may try to unmarry the accessport and see is this is still an issue. Thanks! L

We have written a technical document explaining how the factory boost control system works, you can use this document to help diagnose your vehicle.

Take care,
Christian.

10-19-2006, 09:55 AM	#16
awd4life Junior STI Driver Car: 04 STi Fav Mod: co-pilot Posts: 132 IWSTI Addict since: Jan 2006 Trader Rating: (0)	try a hard reset of the ECU and reflash the RT map, i've had this happen to me twice now in the year i've been running my COBB AP. 8psi is the wastegate spring pressure, so basically it's like you aren't running any boost control and the wastegate is controlling the boost pressure. i bet the spool up is a bit slower to huh? try that before you get pissed pulling the top mount off looking for holes or leaks, most of the time if you have a boost leak you can hear it hiss at the boost pressure it takes to push it open. This ad is not endorsed by this member. Please register or login to hide this ad.

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10-19-2006, 06:00 PM	#17
JAB06 Junior STI Driver Car: 05 STi Location: Edison, NJ Posts: 88 IWSTI Addict since: Apr 2005 Trader Rating: (1)	Same thing happened to my friends wrx last week. It was the vacuum line to the waste gate actuator, the line split apart. I would def check that out

10-21-2006, 11:37 PM	#19
HNIC Junior STI Driver Car: Silver 04 STi Fav Mod: 20g turbo Location: mt dora Posts: 114 IWSTI Addict since: Mar 2006 Trader Rating: (0)	I'm having the same problem I thought it was the line from the t to the wg accuator. I put a new line on and a new pill in the line. No change. Theren't suppose to be two restrictor pills in the line from the turbo to the accuator? I checked the hoses they look good to me.

10-22-2006, 12:02 PM	#20
ArizonaSTI Grassroots STI Racer Car: 06 Subaru STI Fav Mod: DomTune Location: Bellevue/Bothell, WA Posts: 544 IWSTI Addict since: Mar 2006 Trader Rating: (1)	try yelling at your car

10-23-2006, 06:26 AM	#22
crystal_Imprezav Spec C Club Car: Slow 05 STi Fav Mod: Loping Idle Location: Chewy's Garage Posts: 1,877 IWSTI Addict since: Mar 2005 Trader Rating: (12)	Boost gets cut if your IAM drop below a certain value which could explain your above statement. Keep good gas from shell, cheveron, 76, and etc. and see if that corrects the issue.

10-23-2006, 08:51 AM	#23
HNIC Junior STI Driver Car: Silver 04 STi Fav Mod: 20g turbo Location: mt dora Posts: 114 IWSTI Addict since: Mar 2006 Trader Rating: (0)	I don't think I've ever seen full boost since I owned the car. I thought it was the boost gauge but I did some data loggin for the first time with ecuedit. It's reading 7.98psi. Does it make a difference that I have a IHI VF22 turbo?

10-23-2006, 12:38 PM	#25
HNIC Junior STI Driver Car: Silver 04 STi Fav Mod: 20g turbo Location: mt dora Posts: 114 IWSTI Addict since: Mar 2006 Trader Rating: (0)	Yeah I bought the car with it. Imagine how I felt when I found out that there is more. I still don't know that much about the VF 22, still searching. I just want to get full boost out of it right now.

10-23-2006, 05:35 PM	#27
Inertia Senior STI Driver Car: 06 STi Fav Mod: Your Girlfriend Ridin Shotgun Location: Denver, CO Posts: 340 IWSTI Addict since: Jul 2006 Trader Rating: (0)	Go fill up with 100 octane and I mean fill up all the way drive that whole tank for daily use if the problem persists its not fuel related.

10-23-2006, 06:12 PM	#28
HNIC Junior STI Driver Car: Silver 04 STi Fav Mod: 20g turbo Location: mt dora Posts: 114 IWSTI Addict since: Mar 2006 Trader Rating: (0)	I'm in florida I only put 93 oct. Is there a way to test the boost controller on the car?