# Toyota celica gt 1993 **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [November 17, 2015, 11:56pm UTC](https://community.cartalk.com/t/toyota-celica-gt-1993/91731 "2015-11-17T23:56:03Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Toyota\_mark](https://avatars.discourse-cdn.com/v4/letter/t/ba8739/32.png) [@Toyota\_mark](https://community.cartalk.com/u/Toyota_mark)\ **Post date:** [November 17, 2015, 11:56pm UTC](https://community.cartalk.com/t/toyota-celica-gt-1993/91731/1 "2015-11-17T23:56:03Z")
Hi I’ve recently rebuilt my celica gt and the engine management light was on , I wiped it and keep getting the same code 52 which I think is the knock sensor car drives terrible under load , idles up and down a little , I’ve actually replaced the sensor just now and wiped the ecu but as soon as I rev it , bang it’s back and I’m getting the same code 52 Please help lol ---
**Author:** ![keith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/keith/32/5518_2.png) [@keith](https://community.cartalk.com/u/keith)\ **Post date:** [November 18, 2015, 1:40am UTC](https://community.cartalk.com/t/toyota-celica-gt-1993/91731/2 "2015-11-18T01:40:16Z")
Why do you think that code is for the knock sensor? Those codes were not standardized in OBD I. You need a service manual for that vehicle to confirm what the code stands for. ---
**Author:** ![Barkydog](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/barkydog/32/2470_2.png) [@Barkydog](https://community.cartalk.com/u/Barkydog)\ **Post date:** [November 18, 2015, 3:43am UTC](https://community.cartalk.com/t/toyota-celica-gt-1993/91731/3 "2015-11-18T03:43:56Z")
The interweb offers a suggestion. 52 Knock sensor (KS) -circuit Wiring, KS, ECM [http://www.troublecodes.net/toyota/toyota-90-93-celica-89-92-corolla/](http://www.troublecodes.net/toyota/toyota-90-93-celica-89-92-corolla/) ---
**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\ **Post date:** [November 18, 2015, 5:16am UTC](https://community.cartalk.com/t/toyota-celica-gt-1993/91731/4 "2015-11-18T05:16:16Z")
This doesn’t sound like a bad knock sensor to me. It sounds like a vacuum leak, a possible bad igniter, perhaps a loose distributor shaft, maybe a bad EGR system (valve sooted open). What was the extent of the “rebuild”? Did you rebuild the engine? Did you replace any peripheral components? ---
**Author:** ![Toyota\_mark](https://avatars.discourse-cdn.com/v4/letter/t/ba8739/32.png) [@Toyota\_mark](https://community.cartalk.com/u/Toyota_mark)\ **Post date:** [November 18, 2015, 1:07pm UTC](https://community.cartalk.com/t/toyota-celica-gt-1993/91731/5 "2015-11-18T13:07:59Z")
It’s a full rebuild , when I wipe it it’s absolutely fine until it hits 2000 revs then it comes on and it’s the same again , I’ve looked at the wire from it to check for any breaks but couldn’t really see any . My brother (merc mechanic) is having a look over it , thanks for the suggestions I will pass them on to my brother also it wasn’t like that before rebuild so hoping it’s vacuum lines thanks guys will let you know how I get on ---
**Author:** ![Toyota\_mark](https://avatars.discourse-cdn.com/v4/letter/t/ba8739/32.png) [@Toyota\_mark](https://community.cartalk.com/u/Toyota_mark)\ **Post date:** [November 19, 2015, 4:52pm UTC](https://community.cartalk.com/t/toyota-celica-gt-1993/91731/6 "2015-11-19T16:52:04Z")
Does anyone have a pic of the vacuum lines on a celica gt 1993 coupe 3sge engine please ---
**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\ **Post date:** [November 19, 2015, 9:18pm UTC](https://community.cartalk.com/t/toyota-celica-gt-1993/91731/7 "2015-11-19T21:18:38Z")
Try this link. [http://www.toyotapartsoverstock.com/](http://www.toyotapartsoverstock.com/) Or, if you ask the parts guy at your local Toyota dealership, he might be able to print one up for you. ---
**Author:** ![Toyota\_mark](https://avatars.discourse-cdn.com/v4/letter/t/ba8739/32.png) [@Toyota\_mark](https://community.cartalk.com/u/Toyota_mark)\ **Post date:** [November 20, 2015, 1:43am UTC](https://community.cartalk.com/t/toyota-celica-gt-1993/91731/8 "2015-11-20T01:43:07Z")
The vacuum pipes were on incorrect , I’ve put them right now , wiped the code and still the same code 52 and same symptoms again , it drove ok before rebuild , it’s really started to do me head in , so if anyone has any suggestions , thanks ---
**Author:** ![Toyota\_mark](https://avatars.discourse-cdn.com/v4/letter/t/ba8739/32.png) [@Toyota\_mark](https://community.cartalk.com/u/Toyota_mark)\ **Post date:** [November 29, 2015, 3:47am UTC](https://community.cartalk.com/t/toyota-celica-gt-1993/91731/9 "2015-11-29T03:47:39Z")
Hi I need to wire a new wire to the knock sensor , does anyone know where on the ecu it goes ?? Thanks ---
**Author:** ![knfenimore](https://avatars.discourse-cdn.com/v4/letter/k/9fc348/32.png) [@knfenimore](https://community.cartalk.com/u/knfenimore)\ **Post date:** [November 29, 2015, 3:56am UTC](https://community.cartalk.com/t/toyota-celica-gt-1993/91731/10 "2015-11-29T03:56:01Z")
Ask and you shall receive. [http://bgbonline.celicatech.com/90ewd/](http://bgbonline.celicatech.com/90ewd/)