"Chipping" refers to the process of replacing the factory program within a Honda ECU. This involves burning a custom binary (.bin) file to an erasable programmable read-only memory (ROM) chip and installing it into the ECU.

Required Tools and Equipment#

To successfully modify an ECU, the following hardware is required:

• Soldering Iron: Used for installing sockets and components onto the ECU PCB.
• Desoldering Tool: Necessary for removing factory chips or clearing solder from through-holes. Options include a desoldering iron, desoldering braid, or a professional desoldering station.
• ROM Editor: Software used to modify or create binary files for the ECU.
• ROM Burner: Hardware programmer used to write the binary file onto the physical chip.
• ROM Chips: The physical storage medium. The ATMEL AT29C256 is the industry standard for these applications.
• ECU Components: A comprehensive list of necessary resistors, capacitors, and sockets can be found in the Parts For ECUs0 reference.

Tip

If you lack the necessary soldering equipment or experience, consider purchasing a pre-socketed ECU from a reputable supplier to avoid potential damage to the PCB.

Technical Considerations#

Important

OBD0 MPFI ECUs do not always feature a standard removable ROM. However, modification is still possible; refer to the Chipping An 88-89 ECU0 guide for specific procedures regarding these units.

Learning Resources#

For a detailed walkthrough of the modification process, refer to the following documentation:

• Introduction to ECU Chipping: A foundational guide for beginners.
• ECU Definition Codes: A library of base binary files for various engine configurations.
• Desoldering Tips: Best practices for removing components without damaging the ECU circuit board.