How to Tune a Chevy PCM

Save

A Chevy powertrain control module controls the settings for shift points, cooling fan routines and engine idle and timing. It is an on-board computer that is preset at the factory for average driving conditions in a car or truck that hasn't been modified. If the owner installs a set of headers or a new carburetor, the PCM won't cover it and performance will not be what it should be. The PCM can be reprogrammed with new settings that will optimize performance.

Things You'll Need

  • PCM programmer
  • Computer with Internet access
  • Get the new settings from the website of the company that made the aftermarket additions. PCMs can be reprogrammed in segments. If you have added a new carburetor, you can update the PCM without disturbing the settings for the new set of headers. The programmer will come with a universal serial port that allows the settings to be transferred from the computer to the programmer.

  • Turn the key off in the car.

  • Plug the programmer into the PCM port. In most Chevrolets, the PCM port is located to the left of the fuse box, under the dashboard and to the left of the steering wheel. Check your owner's manual or the Internet for the location of your particular model.

  • Turn the key on. The programmer will scan the PCM and ask for the vehicle's identification number. It may also ask for the engine type and size, fuel system type, speedometer reading and transmission type.

  • Choose the portion of the PCM that is being updated. The programmer will give you a menu.

  • Start the information transfer. Depending on the type of programmer you have, you may have to press "Start" or an up arrow. You will see a blue progress bar. It may take up to five minutes to complete the entire transfer.

  • Turn the key off when the process is complete. The programmer may have further instructions if the PCM has to be recalibrated.

Tips & Warnings

  • If the programming process is interrupted, the PCM may have to be reset to the factory defaults and the process started again. Always do re-programming with a fully charged battery. Do not turn the key off, start the engine, turn on any accessories or unplug the programmer.

References

Promoted By Zergnet

Comments

You May Also Like

  • What Is a PCM in the Engine?

    Although cars and trucks are usually thought of as only mechanical devices, they also have many different electronic parts that resemble a...

  • How to Troubleshoot the PCM in a Chevy Truck

    The PCM, or powertrain control module, in your Chevy truck serves as the on-board diagnostic computer for your vehicle. The PCM controls...

  • How to Reset a GM PCM

    The powertrain control module (PCM) in General Motors vehicles is the main computer responsible for controlling most of the vehicle's computerized components...

  • How to Reset the Ford PCM

    The power train control module on a Ford controls every aspect of the vehicle's engine, transmission, clutch and electrical and fuel delivery....

  • How to Reprogram a Chevrolet PCM

    The powertrain control module (PCM) in your vehicle is the main computer controlling its various operating systems. For example, the PCM controls...

  • How to Troubleshoot a Chevy ECM

    Chevrolet vehicles manufactured before 1996 use an internal computer called an Electronic Control Module, and it oversees the automated engine diagnostic routines....

  • How to Reset the Shifting Solenoid on a Chevy S10

    The shifting solenoid on a Chevrolet S-10 pick-up is designed to regulate when the transmission shifts. This solenoid is part of the...

  • How to Tune a '95 Chevy Pickup

    Performing a tune-up on a 1995 Chevy pickup is necessary every 100,000 miles if your truck has platinum spark plugs. Otherwise, you...

Related Searches

Check It Out

How To Travel For Free With Reward Points

M
Is DIY in your DNA? Become part of our maker community.
Submit Your Work!