Tuning Information and Common Questions

Wideband Setup & Transform Function

Note: We strongly recommend AEM 30-0334 for our Gen IV & V (CAN) customer vehicles. Often we have customers send datalogs where the wideband clearly isn’t matching up with the narrow band sensors. This is because the voltage out from the wideband or the voltage IN to HP Tuners isn’t correct. Likely because of some floating ground situation but some

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Idle Setup (Cable Driven Throttle Body)

Idle Setup (Cable Driven Throttle Body) No aftermarket throttle body should be expected to work out of the box. Also, if you have a large cam and/or more displacement changes may be required of the stock throttle body. All GM vehicles with cable driven throttle bodies (not fly by wire) use what is called an IAC motor. This motor controls

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Mail Order Tuning Send In Program

Curious about how our send in mail order tuning program works? Check out our infographic below! The process is simple and straightforward. Mail in your ECM/TCM, we’ll program it and ship it back. No relearns needed!

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Crossed Oxygen Sensor Information

It is common for folks to make the mistake of crossing oxygen sensors when reinstalling during a build. We notice this a lot while reviewing datalogs our customers send in from remote tuning – in the datalog it becomes obvious to us that the oxygen sensors are not plugged in correctly. If we note this in your file, please use

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GM MAP Sensors 1 BAR, 2 BAR, 3 BAR

Check out our handy chart below for identifying GM MAP Sensors (listed here), along with linear/offset data. If you need assistance deciding on which one to use, shoot us an email at sales@pcmofnc.com! Click on the chart to enlarge.

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Remote (Email) Tuning Set Up & Datalogging

For common remote tuning questions, click HERE. Otherwise, check out our video and graphic below on setting up and obtaining a datalog during our remote tuning process. Datalogs must be 15-20 minutes long, and encompass all states (cold start up, part throttle, WOT if safe). Note: We do not accept wideband feedback through external ports/PIDS (i.e. 5v AC). You must

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Remote (Email) Tuning with HP Tuners FAQ

How does remote (email) tuning work? We offer remote tuning with HP Tuners. All files/datalogs are submitted via email, and uploaded/recorded by the end user. This is basically mail order tuning except you have the ability to send us datalogs so that we can fine tune your set up. This is an excellent route for someone who wants to take

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Electric Fan Install Information

Electric Fan Install Addendums Click here to view additional installation instructions and pics to install pins into your ECM. They are the .pdf files. Electric Fan Patches Our fan patches and fan information for our electric fan kits are hosted here. Choose the corresponding folder, right click and save the appropriate file. Open your current tune file with HP Tuners,

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DOD/AFM and VVT Information

Displacement on Demand/Active Fuel Management (DOD/AFM) and Variable Valve Timing (VVT) DOD (also referred to as AFM) and VVT became options starting with Gen 4 LS motors (5.3L, 6.0L, and 6.2L). DOD/AFM disables four cylinders (1,4,6 and 7) at cruise. VVT is Variable Valve Timing. Some motors had both, some had one or the other, and some had none. This

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Piston to Valve Clearance Calculator

Piston to Valve Clearance Calculator Click HERE – and then download “Piston to Valve Clearance Calculator.xls”   Whenever installing a new camshaft, a set of heads, or a fresh build entirely, it is critical to check piston to valve clearance.  At top dead center, at the end of the exhaust stroke and beginning of the intake stroke, the exhaust valve

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