If it ain't broke don't fix it

vbryanv · 04-03-2011, 02:21 AM

This winter I decided to replace my head gasket. After I removed the intake manifold, exhaust manifold, and timing belt related components, I realized that the head gasket had already been replaced (a metal head gasket with ARP studs). While I had everything apart, I replaced the timing belt and related components. In addition, I decided to do a knock sensor rewire, even though I wasn't having any problems with the knock sensor. After reassembling everything, my check engine light now comes on every time I accelerate past 1/4 throttle. If I shut off the car and start it again, the check again light will not turn back on until I accelerate. I keep getting code 52 (for the knock sensor).

I did notice after I finished that I used the wrong wire for the rewire. I used a solid core wire. I'm wondering if it's possible that i have bad knock sensors or that the solid core wire broke somewhere. i plan on checking the wire from the ecu pin to the knock sensor connector. Is it possible to have a bad knock sensor with out the CEL being on, due to faulty wiring and now that the wiring is good the CEL comes on?

cre · 04-03-2011, 05:06 AM

Yes, your trouble could very well be due to the wire. What kind of wire is it exactly? You're best off using shielded coax. Look in the FAQ section for info on rewiring the knock sensors that works. The signal is VERY sensitive and very easy to distort.

vbryanv · 04-03-2011, 09:05 PM

found the issue.

. to much solder on the knock sensor connector and the terminal was not secured properly

I also need help. After the rewire I also now have the abs light on and my temp gauge is not working. I know one has nothing to do with the other but I didnt have the light on before and my gauge was working.

I pulled the codes for the abs and got code 11 ABS Solenoid Relay Circuit and code 33 rear wheel speed senor malfunction. wtf.

Which out of the 4 coolant sensors are the the gauge?

cre · 04-04-2011, 05:39 PM

http://www.toyota-supra.info/forums/...mp-sensor.html

With the ABS codes... well, just inspect that wring and go by the book. The sensor should be an easy fix and the solenoid shouldn't be too bad depending on where the issue lies.

Good luck with it, I'm taking off for a couple days.

04-03-2011, 02:21 AM	#1
vbryanv 3" Exhaust Join Date: Apr 2010 Location: new jersey Posts: 57	If it ain't broke don't fix it This winter I decided to replace my head gasket. After I removed the intake manifold, exhaust manifold, and timing belt related components, I realized that the head gasket had already been replaced (a metal head gasket with ARP studs). While I had everything apart, I replaced the timing belt and related components. In addition, I decided to do a knock sensor rewire, even though I wasn't having any problems with the knock sensor. After reassembling everything, my check engine light now comes on every time I accelerate past 1/4 throttle. If I shut off the car and start it again, the check again light will not turn back on until I accelerate. I keep getting code 52 (for the knock sensor). I did notice after I finished that I used the wrong wire for the rewire. I used a solid core wire. I'm wondering if it's possible that i have bad knock sensors or that the solid core wire broke somewhere. i plan on checking the wire from the ecu pin to the knock sensor connector. Is it possible to have a bad knock sensor with out the CEL being on, due to faulty wiring and now that the wiring is good the CEL comes on?

04-03-2011, 05:06 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Yes, your trouble could very well be due to the wire. What kind of wire is it exactly? You're best off using shielded coax. Look in the FAQ section for info on rewiring the knock sensors that works. The signal is VERY sensitive and very easy to distort. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

04-03-2011, 09:05 PM	#3
vbryanv 3" Exhaust Join Date: Apr 2010 Location: new jersey Posts: 57	found the issue.. to much solder on the knock sensor connector and the terminal was not secured properly I also need help. After the rewire I also now have the abs light on and my temp gauge is not working. I know one has nothing to do with the other but I didnt have the light on before and my gauge was working. I pulled the codes for the abs and got code 11 ABS Solenoid Relay Circuit and code 33 rear wheel speed senor malfunction. wtf. Which out of the 4 coolant sensors are the the gauge? Last edited by vbryanv; 04-03-2011 at 09:20 PM. Reason: need help

04-04-2011, 05:39 PM	#4
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	http://www.toyota-supra.info/forums/...mp-sensor.html With the ABS codes... well, just inspect that wring and go by the book. The sensor should be an easy fix and the solenoid shouldn't be too bad depending on where the issue lies. Good luck with it, I'm taking off for a couple days. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
radiator plug broke!	sd88supra	MKIII Supra	4	01-16-2011 11:52 PM
oops i broke the headlight help	supraluver4life	MKIII Supra	13	12-22-2009 04:04 AM
Speedo cable broke. What next?	Busted Knuckles	MKIII Supra	5	10-25-2009 06:01 AM
Broke something.. and i dont know what it is. help.	Kevin	MKIII Supra	2	06-08-2009 12:10 PM
my 86 broke	pittsupra	MKII Supra	2	06-05-2006 11:42 AM