Toyota celica gt 1993

Maintenance/Repairs
1

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

2

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.

3

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/

4

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?

5

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

6

Does anyone have a pic of the vacuum lines on a celica gt 1993 coupe 3sge engine please

7

Try this link.
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.

8

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

9

Hi I need to wire a new wire to the knock sensor , does anyone know where on the ecu it goes ??
Thanks

10

Ask and you shall receive. http://bgbonline.celicatech.com/90ewd/