proud 1st time owner of 87 supra turbo

cre · 04-10-2012, 12:44 AM

Yes, and I'm here because I find some weird sort of joy in continuing to work after I've already clocked out.

I'm always more than happy to help (my wife reminds me about it all the time... especially now that I'm rebuilding my 80 year old neighbor's 1946 Harley for free) but I'm not going to completely spoon feed anyone.

The diagnostic information you need is already present, I've told you where to look for it and I'm not convinced you've even looked at the FAQ on what each code means. Had you done so you might have found that the code 51 is the easiest code to fix and only has to do with idle issues. Codes 31 and 24 are related to two entirely separate circuits in the AFM... so it is more likely than not the AFM's connector is damaged, corroded or unplugged. Sure, it's possible the two circuits have both failed or the ground line the both share has been damaged but it's not the most common issue. Look in the service manual (again linked to in the FAQ section) for information on how to test the AFM and how to calibrate the TPS.

This is not a hard car to work on at all. Newer cars (incl. '95 Hondas) can be MUCH worse. They're just not as old, beaten up by teenage owners, have cheaper parts and a much better on board diagnostic system.

BTW - This is one of the easier going Supra forums and I'm not being a hard ass at the moment.

EDIT:

Aw hell, here you go:

Diagnostic codes and what they mean.
TSRM - Toyota Service and Repair Manual - It's for a '91 but the majority of information is consistent with earlier models.
TPS - Throttle Position Sensor diagnostic and repair information. Code 51 ONLY related to the IDL switch circuit and calibration.
KVAFM - Karman Vortex Air Flow Meter diagnostic and repair information.

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04-10-2012, 12:44 AM	#13
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Yes, and I'm here because I find some weird sort of joy in continuing to work after I've already clocked out. I'm always more than happy to help (my wife reminds me about it all the time... especially now that I'm rebuilding my 80 year old neighbor's 1946 Harley for free) but I'm not going to completely spoon feed anyone. The diagnostic information you need is already present, I've told you where to look for it and I'm not convinced you've even looked at the FAQ on what each code means. Had you done so you might have found that the code 51 is the easiest code to fix and only has to do with idle issues. Codes 31 and 24 are related to two entirely separate circuits in the AFM... so it is more likely than not the AFM's connector is damaged, corroded or unplugged. Sure, it's possible the two circuits have both failed or the ground line the both share has been damaged but it's not the most common issue. Look in the service manual (again linked to in the FAQ section) for information on how to test the AFM and how to calibrate the TPS. This is not a hard car to work on at all. Newer cars (incl. '95 Hondas) can be MUCH worse. They're just not as old, beaten up by teenage owners, have cheaper parts and a much better on board diagnostic system. BTW - This is one of the easier going Supra forums and I'm not being a hard ass at the moment. EDIT: Aw hell, here you go: Diagnostic codes and what they mean. TSRM - Toyota Service and Repair Manual - It's for a '91 but the majority of information is consistent with earlier models. TPS - Throttle Position Sensor diagnostic and repair information. Code 51 ONLY related to the IDL switch circuit and calibration. KVAFM - Karman Vortex Air Flow Meter diagnostic and repair information. . __________________ 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 ---> Last edited by cre; 04-10-2012 at 12:51 AM.