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By Marshall on 06/30/2015

2008+ STI Fuel Pressure Regulator Kit Update – Technical Overview

2008+ STI Fuel Pressure Regulator Kit Update – Technical Overview

Background: Since their inception, one of the great mysteries of the 2008+ STI has always been the issue of the “2800 RPM” stumbles. These stumbles most visibly demonstrate themselves as a high positive fuel trim (AF Correction #1), indicating a lean air-fuel ratio. One of the results of this phenomenon is noticeable stumbling or interruptions in power delivery, especially under light loads and normal “cruising” speeds. The stumble comes from...

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By Marshall on 06/16/2015

Need Help with your DIY Project? – COBB Knows!

Need Help with your DIY Project? – COBB Knows!

COBB Support During business hours, we’re here to help you with anything you need!  However, we realize that many of our customers enjoy working on their cars during the evening or over weekends when we’re not here to answer the phone.  Luckily, we’ve compiled a massive amount of information to reference when you may find yourself in a bind.  Looking for quick support for a product or general information about...

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By Kyle on 06/03/2015

Ford Ecoboost and the Octane Adjust Ratio Monitor

Ford Ecoboost and the Octane Adjust Ratio Monitor

All Ford Ecoboosts use a dynamic multiplier known as Octane Adjust Ratio.  This parameter can be monitored with the Accessport and is helpful in ensuring the fuel in your tank is adequate.  It is especially important on an Ecoboost vehicle when peak power is expected (dyno tuning, racing) to make sure the parameter is at the optimal -1.0 value. Strategy Background This vehicle is equipped with several dynamic load, airflow, and...

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