Welcome to the North American Subaru Impreza Owners Club Tuesday September 23, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Engine Management & Tuning > Other Engine Management

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 07-30-2009, 01:35 AM   #1
robinbrd311
Scooby Newbie
 
Member#: 212207
Join Date: May 2009
Chapter/Region: NESIC
Location: Lexington
Vehicle:
2004 Impreza WRX
Java Black Pearl

Default Advice Needed for a recent problem with turbo

A few months ago I had to get my maf sensor retuned be cause there was a System Too Lean engine light and the car would knock around 4-6k rpm because the MAF sensor was not working correctly. The Dent Sports Garage in MA simply retuned the sensor and it worked properly up til now.

I drove my car to NY, a 3 hour drive, and it worked fine. On the way back I was accelerating quickly after a toll and the car lagged in each gear around the higher rpms. Every time after that when I had to accelerate to highway speed from a stop the same thing would happen but worse. When I got home the car was in the condition where if I started from first and floored it it would go to a bout 4 or 5k rpm then either stop there or knock and lag a lot and the engine light would flash until I shifted, and the same thing would happen in 2nd gear. (Didn't get to 3rd gear on my street)

I am guessing it is a problem with the MAF sensor again but before I go in and pay for them to work on it I was wondering if anyone knew anything about this.

2004 WRX, Cobb short ram intake, turbo XS front mount intercooler, one step colder spark plugs, tuned at dent sport 15psi boost
* Registered users of the site do not see these ads.
robinbrd311 is offline   Reply With Quote
Old 07-30-2009, 12:02 PM   #2
Benchmark Tuning
Former Vendor
 
Member#: 154444
Join Date: Jul 2007
Chapter/Region: MWSOC
Location: 9120 Medill Ave
Vehicle:
2008 08 STi, Typhoon
06 STi, 847-960-8676

Default

There are quite a few things that can make the car throw a lean code, but if you CEL is flashing that means the ECU is seeing knock. If thats the case sounds like you have a problem, whether it's mechanical or tune related.

There are a few things you can check mechanically to make sure the car is good, I usually recommned doing that to make sure the car is solid before trying to use a tune to compensate for a mechanical problem.

The turbo inlet is a common failure, it usually rips and gets torn i'd check that as one of the first things. If that isn't it, double check your knock senor, make sure your intercooler and pipes are tight as well.
Benchmark Tuning is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Advice Needed for a recent problem with turbo robinbrd311 Service & Maintenance 3 08-02-2009 12:52 AM
Advice Needed for a recent problem with turbo robinbrd311 Factory 2.0L Turbo Powertrain 2 07-30-2009 04:28 PM
Advice Needed for a recent problem with turbo robinbrd311 New England Impreza Club Forum -- NESIC 4 07-30-2009 12:38 PM
Advice Needed for a recent problem with turbo robinbrd311 Factory 2.0L Turbo Powertrain 1 07-30-2009 04:32 AM
Recent problem with my rex. injustice Texas Impreza Club Forum -- TXIC 6 09-25-2007 07:48 PM


All times are GMT -4. The time now is 04:13 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.