Code 52 still after changing both KS's????

Stanghunter · 06-24-2010, 08:58 AM

Hi all,

Noob here and sorry if this is a dumb question. I've searched for KS related stuff and read a lot of info. But I'm still a bit lost.

I'm working on my moms 87turbo/auto. The dealership said it needed KS's so she ordered 2 of them. I just got done installing them and its still throwing code 52. I had the pos bat cable off and the EFI fuse out while I installed the new parts. When I finished up, started it and its still running like crap and throwing code 52.

Any ideas for me???

Thanks in advance!

Brandon

DIASISS · 06-24-2010, 01:11 PM

Quote:

Originally Posted by Stanghunter

Hi all,

Noob here and sorry if this is a dumb question. I've searched for KS related stuff and read a lot of info. But I'm still a bit lost.

I'm working on my moms 87turbo/auto. The dealership said it needed KS's so she ordered 2 of them. I just got done installing them and its still throwing code 52. I had the pos bat cable off and the EFI fuse out while I installed the new parts. When I finished up, started it and its still running like crap and throwing code 52.

Any ideas for me???

Thanks in advance!

Brandon

i think when you put a new KS in you have to reset the computer...

wstanek · 06-24-2010, 04:10 PM

what is a ks?

btwilson86 · 06-24-2010, 04:45 PM

KS= Knock Sensor

Alot of times, the code 52 is from the KS wiring, and not from the KS itself. Usually rewiring the 2 KS on a Turbo Supra (or 1 on a N/A) will correct the problem. Here is the step-by-step rewire page, and here is a thread in this forum discussing the rewire.

And make sure you have that negative battery cable disconnected or you pull the 15 amp EFI fuse out for a few minutes to erase the code from the computer.

Stanghunter · 06-24-2010, 05:05 PM

Quote:

Originally Posted by btwilson86

KS= Knock Sensor

Alot of times, the code 52 is from the KS wiring, and not from the KS itself. Usually rewiring the 2 KS on a Turbo Supra (or 1 on a N/A) will correct the problem. Here is the step-by-step rewire page, and here is a thread in this forum discussing the rewire.

And make sure you have that negative battery cable disconnected or you pull the 15 amp EFI fuse out for a few minutes to erase the code from the computer.

Thanks for the response!

What goes wrong with the factory wiring that we need to rewire the KS?

btwilson86 · 06-24-2010, 05:09 PM

Well, it's a 87. So all the wiring on the car is about 23 years old.... After countless hot/cold cycles, the wires become brittle, insulation wears away.... The time is just rough for wiring, so it needs to get replaced.

Stanghunter · 06-24-2010, 04:46 PM

Quote:

Originally Posted by DIASISS

i think when you put a new KS in you have to reset the computer...

I was under the impression that pulling the EFI fuse did reset it? The engine light was out for a few minutes and then came back on.

KS= Knock sensor

btwilson86 · 06-24-2010, 04:48 PM

Pulling the EFI fuse cuts the power to the computer, and after a few minutes the computer no longer has a residual charge, thus clearing its memory of stored codes.

Mike87 · 08-04-2010, 06:52 PM

Hi all, so what if u have a code 52 but everything seems to b fine. Runs good, sounds good. Thanks!

Green7mgte · 08-04-2010, 07:12 PM

Quote:

Originally Posted by Mike87

Hi all, so what if u have a code 52 but everything seems to b fine. Runs good, sounds good. Thanks!

damn edit button..

reset your code bank
could be an old stored code.

06-24-2010, 08:58 AM	#1
Stanghunter Stock Join Date: Jun 2010 Location: Oregon Posts: 8	Code 52 still after changing both KS's???? Hi all, Noob here and sorry if this is a dumb question. I've searched for KS related stuff and read a lot of info. But I'm still a bit lost. I'm working on my moms 87turbo/auto. The dealership said it needed KS's so she ordered 2 of them. I just got done installing them and its still throwing code 52. I had the pos bat cable off and the EFI fuse out while I installed the new parts. When I finished up, started it and its still running like crap and throwing code 52. Any ideas for me??? Thanks in advance! Brandon

06-24-2010, 04:45 PM	#4
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	KS= Knock Sensor Alot of times, the code 52 is from the KS wiring, and not from the KS itself. Usually rewiring the 2 KS on a Turbo Supra (or 1 on a N/A) will correct the problem. Here is the step-by-step rewire page, and here is a thread in this forum discussing the rewire. And make sure you have that negative battery cable disconnected or you pull the 15 amp EFI fuse out for a few minutes to erase the code from the computer. __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

06-24-2010, 05:09 PM	#6
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Well, it's a 87. So all the wiring on the car is about 23 years old.... After countless hot/cold cycles, the wires become brittle, insulation wears away.... The time is just rough for wiring, so it needs to get replaced. __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

06-24-2010, 04:48 PM	#8
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Pulling the EFI fuse cuts the power to the computer, and after a few minutes the computer no longer has a residual charge, thus clearing its memory of stored codes. __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

08-04-2010, 06:52 PM	#9
Mike87 Stock Join Date: Aug 2010 Location: SC Posts: 11	Code 52 but all ok Hi all, so what if u have a code 52 but everything seems to b fine. Runs good, sounds good. Thanks! Last edited by Green7mgte; 08-04-2010 at 07:12 PM.

06-24-2010, 04:10 PM	#3
wstanek 3" Exhaust Join Date: Apr 2010 Location: Stoney Creek Posts: 178	what is a ks?

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