To adjust the target idle RPM in an OBD0 PM7 ECU, you must locate and modify the hex idle target string within the ROM file.

Idle Target Identification#

The idle target values are stored as a string of six hexadecimal values representing different engine operating conditions.

Important

All values must be calculated using the OBD0 16-bit RPM formula.

Example Modification#

In the PM7FOR6_12-15-02.BIN ROM, the default idle target string is: 0A08 09C4 0964 0A77 09C4 0964

To set a constant target idle of 1000 RPM, replace all six values in the string with the hex equivalent for 1000 RPM: 0753 0753 0753 0753 0753 0753

Reference#

{{> obd0-16bit-rpm-formula }}