# Boost control overshooting **URL:** \ **Category:** V3 SOFTWARE\ **Created:** [November 17, 2024, 6:47am UTC](https://community.ecumaster.com/t/boost-control-overshooting/2784 "2024-11-17T06:47:07Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![ttxpc](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/ttxpc/32/2515_2.png) [@ttxpc](https://community.ecumaster.com/u/ttxpc)\ **Post date:** [November 17, 2024, 6:47am UTC](https://community.ecumaster.com/t/boost-control-overshooting/2784/1 "2024-11-17T06:47:07Z")
Hi guys, not understanding why my boost duty cycle is going to max dc, overshoots into fuel cut ![Screenshot 2024-11-17 17.42.30](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/4/4057ef15dd1928ccebd79cec236f13674868dba9.png) ![Screenshot 2024-11-17 17.46.21](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/0/059357b4bc9144b73e453552cc79b9a284dcbfd2.png) ---
**Author:** ![derUltraTT](https://avatars.discourse-cdn.com/v4/letter/d/ba8739/32.png) [@derUltraTT](https://community.ecumaster.com/u/derUltraTT)\ **Post date:** [November 17, 2024, 7:45am UTC](https://community.ecumaster.com/t/boost-control-overshooting/2784/2 "2024-11-17T07:45:51Z")
I think u have bad PID settings. Disable it and try again. Also have a look on the channels “boost target” and “boost dc correction”. Probably a correction increases ur target. ---
**Author:** ![xsd](https://avatars.discourse-cdn.com/v4/letter/x/b5e925/32.png) [@xsd](https://community.ecumaster.com/u/xsd)\ **Post date:** [November 17, 2024, 7:49am UTC](https://community.ecumaster.com/t/boost-control-overshooting/2784/3 "2024-11-17T07:49:04Z")
I think the Setup for Boost - Duty Cylce Feedback is wrong. Should be lower DC over your Target Boost. So if you want 200kpa with 35% DC - over 200kpa the DC should lower as example 10% DC or so ---
**Author:** ![derUltraTT](https://avatars.discourse-cdn.com/v4/letter/d/ba8739/32.png) [@derUltraTT](https://community.ecumaster.com/u/derUltraTT)\ **Post date:** [November 17, 2024, 9:12am UTC](https://community.ecumaster.com/t/boost-control-overshooting/2784/4 "2024-11-17T09:12:46Z")
U are right…this table is defenitly also wrong, but it doesnt explain the overboost and 85% boost DC. ---
**Author:** ![ttxpc](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/ttxpc/32/2515_2.png) [@ttxpc](https://community.ecumaster.com/u/ttxpc)\ **Post date:** [November 17, 2024, 9:13am UTC](https://community.ecumaster.com/t/boost-control-overshooting/2784/5 "2024-11-17T09:13:55Z")
Thanks for looking, i have boost pid disabled ---
**Author:** ![ttxpc](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/ttxpc/32/2515_2.png) [@ttxpc](https://community.ecumaster.com/u/ttxpc)\ **Post date:** [November 17, 2024, 9:21am UTC](https://community.ecumaster.com/t/boost-control-overshooting/2784/6 "2024-11-17T09:21:52Z")
Thanks, in v2 35dc would give me around 200kpa, now it overshoots like the wastegate is welded shut :), out of boost margin is always yes even, as the boost comes up and past the set point, i simply dont understand the boost control strategy i think, have gone back to v2 while i ponder this ---
**Author:** ![ttxpc](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/ttxpc/32/2515_2.png) [@ttxpc](https://community.ecumaster.com/u/ttxpc)\ **Post date:** [November 17, 2024, 9:50am UTC](https://community.ecumaster.com/t/boost-control-overshooting/2784/7 "2024-11-17T09:50:36Z")
As you can see here all the boost target corrections are set to 0, yet boost target correction is at 100 ![Screenshot 2024-11-17 20.46.58](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/d/d9b902471a713c93dbe44c022f859ed6cccbb35a.png) ![Screenshot 2024-11-17 20.47.45](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/7/7f3c084c55d497328cd82465ae01ae06f6aec7f9.png) ---
**Author:** ![derUltraTT](https://avatars.discourse-cdn.com/v4/letter/d/ba8739/32.png) [@derUltraTT](https://community.ecumaster.com/u/derUltraTT)\ **Post date:** [November 17, 2024, 10:34am UTC](https://community.ecumaster.com/t/boost-control-overshooting/2784/8 "2024-11-17T10:34:03Z")
CAN u post project and a the logfile? U get a fuelcut although u are far below target boost. Is probably here: ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/8/8c3fa8f58672c0d8cc4e8893dd76598fc4115181.png) set something strange? And forget what i wrote about PID…has nothing to do with ur problem i see now. ---
**Author:** ![kimbaku](https://avatars.discourse-cdn.com/v4/letter/k/8edcca/32.png) [@kimbaku](https://community.ecumaster.com/u/kimbaku)\ **Post date:** [November 17, 2024, 1:38pm UTC](https://community.ecumaster.com/t/boost-control-overshooting/2784/9 "2024-11-17T13:38:13Z")
You missunderstood kpa with kpa g Your target is too high thats why you are out of margin (max duty) until boost cut ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [November 17, 2024, 2:13pm UTC](https://community.ecumaster.com/t/boost-control-overshooting/2784/10 "2024-11-17T14:13:47Z")
50kpa g of Boost is equal to 150kpa of MAP ( when baro is 100kpa) ---
**Author:** ![ttxpc](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/ttxpc/32/2515_2.png) [@ttxpc](https://community.ecumaster.com/u/ttxpc)\ **Post date:** [November 17, 2024, 6:53pm UTC](https://community.ecumaster.com/t/boost-control-overshooting/2784/11 "2024-11-17T18:53:01Z")
Yes it’s hitting max pressure fuel cut of 255 kPa, I see now that the units in boost control are kPa gauge, not absolute, that will be the problem ---
**Author:** ![ttxpc](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/ttxpc/32/2515_2.png) [@ttxpc](https://community.ecumaster.com/u/ttxpc)\ **Post date:** [November 17, 2024, 6:54pm UTC](https://community.ecumaster.com/t/boost-control-overshooting/2784/12 "2024-11-17T18:54:31Z")
Thanks, that will be the problem 👍 ---
**Author:** ![ttxpc](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/ttxpc/32/2515_2.png) [@ttxpc](https://community.ecumaster.com/u/ttxpc)\ **Post date:** [November 17, 2024, 6:56pm UTC](https://community.ecumaster.com/t/boost-control-overshooting/2784/13 "2024-11-17T18:56:14Z")
Thanks, I missed that it’s kpag in boost control, that will be it