# 3 Bar Map sensor Locally **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [May 29, 2006, 9:14pm UTC](https://forums.speedlife.net/t/3-bar-map-sensor-locally/12661 "2006-05-29T21:14:14Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Viper966](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/viper966/32/7268_2.png) [@Viper966](https://forums.speedlife.net/u/Viper966)\ **Post date:** [May 29, 2006, 9:14pm UTC](https://forums.speedlife.net/t/3-bar-map-sensor-locally/12661/1 "2006-05-29T21:14:14Z")
The map sensor on my car is reading off, i think it was reading the same last year but now i really just noticed it (before it was metric Kpa and i never converted accuratly to mmHg) i CAN tune the car on the off calibrated map sensor since its all relative, but if i ever have to change map sensors the thing is gonna need to be retuned so who has a 3 bar locally or something i can borrow just for tommorow (gettin tuned @ 230) ---
**Author:** ![Zer0DazE](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/zer0daze/32/7624_2.png) [@Zer0DazE](https://forums.speedlife.net/u/Zer0DazE)\ **Post date:** [May 30, 2006, 4:45am UTC](https://forums.speedlife.net/t/3-bar-map-sensor-locally/12661/2 "2006-05-30T04:45:10Z")
what are you talking about? a map sensor converts pressure to volts. it doesnt have anything to do with kpa, psi, or bar. maybe i need more coffee ---
**Author:** ![Viper966](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/viper966/32/7268_2.png) [@Viper966](https://forums.speedlife.net/u/Viper966)\ **Post date:** [May 30, 2006, 7:27am UTC](https://forums.speedlife.net/t/3-bar-map-sensor-locally/12661/3 "2006-05-30T07:27:54Z")
its reading the wrong VOLTS at the wrong pressure, when i started it up without the car running it was reading -12 psi (converted by my haltech) ---
**Author:** ![Inn-Tune](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/inn-tune/32/7588_2.png) [@Inn-Tune](https://forums.speedlife.net/u/Inn-Tune)\ **Post date:** [May 30, 2006, 7:31am UTC](https://forums.speedlife.net/t/3-bar-map-sensor-locally/12661/4 "2006-05-30T07:31:11Z")
Since I’m tuning the car you could ask me…and I have them in stock. 🙂 Sometimes when you read a pressure sensor through standalone software with the car off they read wrong. On an AEM EMS they do just what you’re saying. Does it read ok with the car on? ---
**Author:** ![Viper966](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/viper966/32/7268_2.png) [@Viper966](https://forums.speedlife.net/u/Viper966)\ **Post date:** [May 30, 2006, 7:34am UTC](https://forums.speedlife.net/t/3-bar-map-sensor-locally/12661/5 "2006-05-30T07:34:36Z")
i was gonna ask u, but i didnt think ud appreciate the call at 12 last nite ill check how its running when its on, but the car stillruns/drives fine ---
**Author:** ![Inn-Tune](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/inn-tune/32/7588_2.png) [@Inn-Tune](https://forums.speedlife.net/u/Inn-Tune)\ **Post date:** [May 30, 2006, 7:36am UTC](https://forums.speedlife.net/t/3-bar-map-sensor-locally/12661/6 "2006-05-30T07:36:56Z")
> [@Viper966](#): > > i was gonna ask u, but i didnt think ud appreciate the call at 12 last nite > > ill check how its running when its on, but the car stillruns/drives fine If the car drives fine the MAP sensor works. 😉 ---
**Author:** ![Zer0DazE](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/zer0daze/32/7624_2.png) [@Zer0DazE](https://forums.speedlife.net/u/Zer0DazE)\ **Post date:** [May 30, 2006, 7:37am UTC](https://forums.speedlife.net/t/3-bar-map-sensor-locally/12661/7 "2006-05-30T07:37:12Z")
> [@Viper966](#): > > its reading the wrong VOLTS at the wrong pressure, when i started it up without the car running it was reading -12 psi (converted by my haltech) ah, now i see