Having some Troubles...

btwilson86 · 05-03-2008, 05:13 AM

When you put in your TPS did you 1) Get the right one, and 2) Set it per TSRM? There are two (that I know of) different TPS for the MKIII Supras, one plastic and metal and one all plastic. The rotating piece on the inside is 90 degrees different from each other, so I would verify that when your TPS is installed that your throttle body actually spins the inside of the TPS. After doing that, look up in the TSRM the resistance Specs for the different check points on the TPS and make sure they're in spec, otherwise you'll keep getting that code.

f00g00 · 05-03-2008, 08:03 AM

The IDL code is probably set by the TPS being out of rig. You can set it as per this page in the TSRM.
MK3 TSRM On-Line

The Knock sensor is a coax wire that could be shorted or open somewhere, You can read that from the ECU to verify the wire if it is shorted and from the ECU to the plug end to verify the wire has continuity from the ECU. I don't know how to physically check the sensor to see if its good so basically all you can do is to check the wire. That area gets alot of heat so there is a chance that it has become brittle over time and just removing the plug could have inadvertantly broken the signal wire. There is a "How to" rewire the knock sensor here and more info on the sensor itself. The turbo has 2 btw so ignore that part of the writeup, the NA's just have one.
Knock Sensor Rewire

05-03-2008, 05:13 AM	#1
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	When you put in your TPS did you 1) Get the right one, and 2) Set it per TSRM? There are two (that I know of) different TPS for the MKIII Supras, one plastic and metal and one all plastic. The rotating piece on the inside is 90 degrees different from each other, so I would verify that when your TPS is installed that your throttle body actually spins the inside of the TPS. After doing that, look up in the TSRM the resistance Specs for the different check points on the TPS and make sure they're in spec, otherwise you'll keep getting that code. __________________ 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

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05-03-2008, 08:03 AM	#2
f00g00 12psi boost Join Date: Aug 2005 Location: Kuwait Posts: 292	The IDL code is probably set by the TPS being out of rig. You can set it as per this page in the TSRM. MK3 TSRM On-Line The Knock sensor is a coax wire that could be shorted or open somewhere, You can read that from the ECU to verify the wire if it is shorted and from the ECU to the plug end to verify the wire has continuity from the ECU. I don't know how to physically check the sensor to see if its good so basically all you can do is to check the wire. That area gets alot of heat so there is a chance that it has become brittle over time and just removing the plug could have inadvertantly broken the signal wire. There is a "How to" rewire the knock sensor here and more info on the sensor itself. The turbo has 2 btw so ignore that part of the writeup, the NA's just have one. Knock Sensor Rewire