restrictor pill for boost creep

**Donkey** · 10-08-2008 12:12 PM

Originally Posted by jorgee17

So basically i have a 2007 subaru wrx with a full turbo back exhaust a new intake and maf, i'm getting ridiculous boostcreep and i was wondering if anyone had specific suggestions on what to do next...

i'm fairly new to subarus and could use some helpful suggestions.

Uhhhmmm,try reading the very first page in this thread.Pretty much tells ya everything.Then read the rest of the thread if that doesn't work.........

C'mom people don't be lazy.The answers are right in front of you.You really don't even have to look very hard.

**DavC825** · 12-19-2008 08:57 AM

Originally Posted by bbjoy

This has happened 3 times.....all about 1 month apart. if im pushing it in 4th and shift to 5th get up to about 4000rpm and the boost will dump with throttle, the car will lurch forward but not shut off and then the CEL will come on and cruise will flash but after the lurch it will be right back to normal. Just wondering what could be done to fix this...im guessing this is fuel cut but if im wrong correct me. Im running Cobb tbe with HF cat, SPT heatshield, Cobb SR intake, and Cobb AP stage 2. Im just confused because it seems this shouldnt happen with the HF cat.

this has also happened to me but i had the accessport st 1 on it. after AP stage 2 its never happened again, and i have a bell mouth invidia downpipe with a high flow cat.

**DavC825** · 01-31-2009 10:20 PM

So, this **** just happened to me on my way home, i hate fuel cuts it pisses me off. This is the second time its happened. WTF!?!?

**mantosride** · 10-21-2009 09:51 PM

I am having problems with compressor surge not sure whats going on its a stock turbo

***mycologist*** · 10-22-2009 04:34 AM

Originally Posted by mantosride

I am having problems with compressor surge not sure whats going on its a stock turbo

It is entirely a different topic (just FYI). You need to readjust or fix your BOV although I would recommend putting on a stock one instead. Adjust it so it is softer and blows off easier.

**degeso** · 10-23-2009 05:17 AM

Originally Posted by jorgee17

So basically i have a 2007 subaru wrx with a full turbo back exhaust a new intake and maf, i'm getting ridiculous boostcreep and i was wondering if anyone had specific suggestions on what to do next...

i'm fairly new to subarus and could use some helpful suggestions.

on cobbs website they talk about the restrictor pill for your turbo in the vac line it tells you to make the pill smaller to prevent creep and spikes

**Xavium** · 04-03-2010 05:47 PM

I think I had my first boost creep expereince. I have a 03 WRX with a APEXi catback exhaust. I was running at high RPMs in 3rd, changing gears when the car kinda lurched and jerked. It scared me, I thought I blew my engine or crushed my tranny. I read that with the 2.0 boostcreep wasn't a big issue, but that's what happened. I read the code that came up, it was the "Turbo/Sup wastegate solonoid A range performance" so I'm guessing it was the boostcreep. Anything else that can cause this? I have a boostguage installed, sometimes it spikes pretty high (it says 18) when I accelerate, is this normal?

Thanks!

***mycologist*** · 04-05-2010 05:41 AM

Originally Posted by Xavium

I think I had my first boost creep expereince. I have a 03 WRX with a APEXi catback exhaust. I was running at high RPMs in 3rd, changing gears when the car kinda lurched and jerked. It scared me, I thought I blew my engine or crushed my tranny. I read that with the 2.0 boostcreep wasn't a big issue, but that's what happened. I read the code that came up, it was the "Turbo/Sup wastegate solonoid A range performance" so I'm guessing it was the boostcreep. Anything else that can cause this? I have a boostguage installed, sometimes it spikes pretty high (it says 18) when I accelerate, is this normal?

Thanks!

Is the catback the only mod? Was it tuned or anything? Did you get it used? 18 psi spikes (if accurate) are not normal for a stock tune with catback.

It sounds like your overboosting is being caused by some issue other than creep most likely.

**wrxwagn123** · 05-03-2010 09:12 AM

if you know where your boost controll selenoid is im almost positive one of the lines are loose or off because i had this happen to me to

**Xavium** · 05-04-2010 07:27 AM

Originally Posted by wrxwagn123

if you know where your boost controll selenoid is im almost positive one of the lines are loose or off because i had this happen to me to

Exactly! I found a loose vacuum tube, plugged it back in and it's been fine since! Thanks man!

**RODERMAN** · 10-25-2010 11:06 AM

Can boost creep happen to a stock car?

**savage08STI** · 03-01-2011 04:12 PM

Just want to add to this for anyone out there planning on going stage2 or higher. Do not go catless with your down pipe or turbo back exhaust unless you plan on upgrading your turbo, fuel system, and intercooler at the same time. going catless at stage2 or lower will result in major boost creep and boost spikes up to 22.3 (sensor max) and higher.(completely over working the turbo!) I know this from experiance with my 08 STI. I think if you plan on going above stage2, you should build the entire motor or buy a built motor anyway.... but thats just my opinion. If you want to see an example check out my protune results in Electronic Tuning. 311 WHP 329 WTQ, it tapers off at 5k instead of 6k+ which will be fixed when I get my down pipe catted. We had to cut most of the boost early to prevent it from creeping to 20+ after 5k. Once the down pipe is catted we should be able to keep the Boost and WHP flat accross the chart to about 6k.

MODS
AMR turbo Back Exhaust
K&N Typhoon
Cobb AP2.0
Protune Stage2 Map

**illerikill** · 02-07-2013 08:51 PM

old thread but i recently bought a wrx, yesterday to be exact and today on the highway i experienced this FUEL CUT u all speak of, being noobie to rubies, but a former clubrsx member i knew that the forums were my first go to place for info, i found this thread and it all make sense, i have a cobb DP and exhaust/ muffler whatever u call it, it says that an external waste gate should do the trick so would this fix it? 38mm External Waste Gate Blow Off Valve BOV Adapter Kit Pipe Coupler Clamps | eBay

**EJ257** · 02-08-2013 04:20 AM

Originally Posted by illerikill

old thread but i recently bought a wrx, yesterday to be exact and today on the highway i experienced this FUEL CUT u all speak of, being noobie to rubies, but a former clubrsx member i knew that the forums were my first go to place for info, i found this thread and it all make sense, i have a cobb DP and exhaust/ muffler whatever u call it, it says that an external waste gate should do the trick so would this fix it? 38mm External Waste Gate Blow Off Valve BOV Adapter Kit Pipe Coupler Clamps | eBay

Knowing forums are a good place to get answers to issues is a great first step. Knowing eBay isn't where you should be shopping for parts is another

That will not work with our cars. You need a flange for the EWG off the uppipe. That said, I don't think that's really necessary, in this case. It's likely you simply overboosted an amount to trigger the DTC. What's done to the car?