# REV Matching intermittently not working **URL:** \ **Category:** EMU BLACK / CLASSIC\ **Created:** [July 19, 2026, 12:12pm UTC](https://community.ecumaster.com/t/rev-matching-intermittently-not-working/6204 "2026-07-19T12:12:22Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![Sc66](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/sc66/32/6131_2.png) [@Sc66](https://community.ecumaster.com/u/Sc66)\ **Post date:** [July 19, 2026, 12:12pm UTC](https://community.ecumaster.com/t/rev-matching-intermittently-not-working/6204/1 "2026-07-19T12:12:22Z")
I have an issue where REV Matching will sometimes not work, and i cannot see why. It usually works, but when it doesn’t The “rev match armed state” is “YES” but the “rev match active state” is “NO” As far as a I can see everything required is active when it should be - Brake pedal, Clutch Pedal, VSS \> 20kph, 3rd gear downshifting into 2nd, RPM within range 3000rpm, PPS \>2.5% (0.6%) - I cannot see anything different between when it is working and when it doesn’t Side note - I have rev matching enabled though a function 4, so that I could enable it off of a CAN keypad latching switch 4 state B and C - I cant see another way off doing this (Suggestions?) - If there was an inverted option available I would use that (eg “Latching switch 4 A inverted”) I dont see this being an issue though as Rev matching does work most of the time The log shows 6 successful rev matches and 4 failed rev matches Thanks for any help or tips! [Rav match fail example v3068 1972026.emublog3](https://community.ecumaster.com/uploads/short-url/plwOp72BvPAenzcRKtr6vC5Y9ID.emublog3) (518.5 KB) ![Screenshot 2026-07-19 212221](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/0/0aa019b4fa40cea828580be17ece71973fcfde79.png) [3068 2.emub3](https://community.ecumaster.com/uploads/short-url/nTxPiUs5U6kYlORVVhoiiG4dFPr.emub3) (76.3 KB)