Omg please help me

cre · 12-03-2009, 11:21 PM

A timing advance of that much is what the ECU will do in certain states, but it's definitely not where you want to set it. If the timing keeps wondering after being set it leads me to believe that you are either jumping the wrong terminals when setting it, your failure to fix the error codes first is biting you in the ass OR your timing belt is shot.

The timing is supposed to be set at 10?BTDC with the jumper in place. once the jumper is removed the timing is dynamic and controlled by the ECU.

Code 51 means either the TPS IDL switch isn't closing twhen the throttle is released or the A/C switch was turned "on" OR the A/C compressor signal wire has a short. Pretty easy to diagnose... of course you get the code if the TPS is unplugged... there's definitely no way the IDL switch will close if it's no even plugged in...

Check your TPS alignment: http://www.cygnusx1.net/Supra/Librar...spx?S=FI&P=101

Back to spark plugs: NGK Platinums are what Toyota receommends for the MKIII (it even came with them). Autolites work in a pinch (I'm running a set right now actually) but often people have issues. If you change the plugs and use Autolites and have problems... well... look at what you just worked on.

As for the helicoils, if they back out then you tapped too large for them or the surrounding material of the head had anealed or fatigued beyond servicablility. If they do back out again take the car to a GOOD shop and have them check if helicoils are even going to last. If they determine it is a valid option then have them replace them with timeserts: http://www.timesert.com/ They are far more reliable and much more robust.

12-03-2009, 11:21 PM	#6
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	A timing advance of that much is what the ECU will do in certain states, but it's definitely not where you want to set it. If the timing keeps wondering after being set it leads me to believe that you are either jumping the wrong terminals when setting it, your failure to fix the error codes first is biting you in the ass OR your timing belt is shot. The timing is supposed to be set at 10?BTDC with the jumper in place. once the jumper is removed the timing is dynamic and controlled by the ECU. Code 51 means either the TPS IDL switch isn't closing twhen the throttle is released or the A/C switch was turned "on" OR the A/C compressor signal wire has a short. Pretty easy to diagnose... of course you get the code if the TPS is unplugged... there's definitely no way the IDL switch will close if it's no even plugged in... Check your TPS alignment: http://www.cygnusx1.net/Supra/Librar...spx?S=FI&P=101 Back to spark plugs: NGK Platinums are what Toyota receommends for the MKIII (it even came with them). Autolites work in a pinch (I'm running a set right now actually) but often people have issues. If you change the plugs and use Autolites and have problems... well... look at what you just worked on. As for the helicoils, if they back out then you tapped too large for them or the surrounding material of the head had anealed or fatigued beyond servicablility. If they do back out again take the car to a GOOD shop and have them check if helicoils are even going to last. If they determine it is a valid option then have them replace them with timeserts: http://www.timesert.com/ They are far more reliable and much more robust.