knock sensor rewire help!!

turbosupraIII · 02-26-2010, 06:43 PM

ok i did the rewire and the light is off.... i drove the car and its still doing the same thing wont let me go past 2500 rpm if i floor it, but if i baby it, it lets me go?? any idea what this can be????

turbosupraIII · 02-26-2010, 06:44 PM

also the cel did not come on

cre · 02-26-2010, 06:50 PM

You had other error codes... have you inspected the indicated systems? Have you checked for new error codes? The Check engine light only comes on for a couple error conditions; The lack of a CEL does not mean that you're good to go.

turbosupraIII · 02-26-2010, 08:16 PM

ok so i went to check the codes and it just flashes really flash no stop

turbosupraIII · 02-27-2010, 02:03 PM

can this be maybe a fuel cuy off, like a bad fuel pump or weak one?

turbosupraIII · 03-03-2010, 07:27 PM

I told u it was a boost leak but u insisted that it was the knock sensor causing my car to not go over 2500 rpm I did a smoke test on the vac hoses and found multiple hoses dry rotted and fixed them and now car is perfect

cre · 03-04-2010, 01:55 AM

Nope... I told you to check for codes... then I told you to address them. I told you that certain diagnostic codes would cause the ECU to go into "limp mode" and YOU latched on to the code 52... Dunno what you want... if free advice isn't good enough go to the dealership.

Quote:

Originally Posted by cre

Well, that explains a lot. The car is running in what's generally known as "limp mode"... it's a fail safe mode where the ECU, in response to certain diagnostic failures, imposes a low RPM rev limit, adds a lot of fuel and pulls spark advance.

Now, did you clear the codes after checking the first time, then take it for a drive and recheck?

You need to handle the error codes one at a time. The code 52 is rather common and is generally resolved by rewiring the sensors; see the MKIII FAQ section for a writeup on it.

24 and 31 are both AFM related codes. Inspect the harness and contacts for damage and signs of corrosion. Then reconnect and make sure the connection is solid.

After each of these you may reset the ECU and take the car for a medium distance drive and recheck for recurring codes when you get back home.

If the AFM related codes continue follow the instructions here:
http://www.cygnusx1.net/Supra/Librar...ection=FI&P=96

Quote:

Originally Posted by cre

If the problem is the wiring... the problem is the wiring. That's the most common cause of an error 52 and it's the cheapest thing to do to try to fix it.

Sorry for trying to save you money.

And there's not one vacuum line in the engine bay that would completely prevent the car from revving higher than 2500RPM... do you mean an intake hose was split? You know, it's not my responsibility nor that of any member here to teach you to check for every little thing; Additionally, the diagnostic codes are the first thing they're going to check for and work on at your local dealership.

Don't be such an ingrate or take your problems elsewhere.

turbosupraIII · 03-04-2010, 02:05 PM

WOW what i said was can it BE a boost leak in the very beggining and now ur upset like i said u were wrong lol sorry to bother u then no need to tie ur panties in a bunch

02-26-2010, 06:50 PM	#3
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	You had other error codes... have you inspected the indicated systems? Have you checked for new error codes? The Check engine light only comes on for a couple error conditions; The lack of a CEL does not mean that you're good to go. __________________ 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 --->

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02-26-2010, 06:43 PM	#1
turbosupraIII Stock Join Date: Feb 2010 Location: schaumburg, IL Posts: 16	ok i did the rewire and the light is off.... i drove the car and its still doing the same thing wont let me go past 2500 rpm if i floor it, but if i baby it, it lets me go?? any idea what this can be????

02-26-2010, 06:44 PM	#2
turbosupraIII Stock Join Date: Feb 2010 Location: schaumburg, IL Posts: 16	also the cel did not come on

02-26-2010, 08:16 PM	#4
turbosupraIII Stock Join Date: Feb 2010 Location: schaumburg, IL Posts: 16	ok so i went to check the codes and it just flashes really flash no stop

02-27-2010, 02:03 PM	#5
turbosupraIII Stock Join Date: Feb 2010 Location: schaumburg, IL Posts: 16	can this be maybe a fuel cuy off, like a bad fuel pump or weak one?

03-03-2010, 07:27 PM	#6
turbosupraIII Stock Join Date: Feb 2010 Location: schaumburg, IL Posts: 16	I told u it was a boost leak but u insisted that it was the knock sensor causing my car to not go over 2500 rpm I did a smoke test on the vac hoses and found multiple hoses dry rotted and fixed them and now car is perfect

03-04-2010, 02:05 PM	#8
turbosupraIII Stock Join Date: Feb 2010 Location: schaumburg, IL Posts: 16	WOW what i said was can it BE a boost leak in the very beggining and now ur upset like i said u were wrong lol sorry to bother u then no need to tie ur panties in a bunch