Hello Everyone 

I got a diagnostic ran on my 1992 3000gt SL, and these are the codes that came up, along with a description.

PO11 – O2 sensor
PO12 - air flow meter
PO14 – TPS signal out of range
PO21 – Temp sensor out of range
PO31 – Knock sensor circuit
PO43 - EGR System
PO53 – ign signal or coil #3 and 6
PO82 – intake air
PO61 – ELC-4AT error (torque reduction)

Can anyone tell me about how much this all should cost to fix? Also, is there any order of importance at this point? Would any of these issues be an easy fix? Any help is appreciated, as I determine if I want to put any money into this car.

I'd be real suprised if half of those codes were legitimate, more likely had a problem at one time and was stored in the ECU. Try resetting the ECU (pull negative battery terminal for 5mins) and see if after 10-20miles any/all of them return.

Also make sure that the ECU itself is not fried. Not sure about the 3KGTs but the DSMs had issues with ECU Board capacitor leakage over time which could damage the board traces and cause all sorts of odd codes/ECU anomolies.

If you pull the cover it should be visibly apparent and may have an odor of rotton eggs (the fluid inside the CAPs).

Awesome, thanks for the advice. I'm going to check out the ECU this weekend. I will post an update afte I look into it.

If you need those or just one or 2 sensors goto 3si.org someone there iam sure will have some alot cheaper then the parts store , does the car run like crap if your getting alot of codes the ecu in first gen 3s cars have a bad reputation of going out , the capacitors leak down make car do crazy things ,i rebuilt mine when i bought the car about a year and a half ago .Good luck

From a diagnostic standpoint.always eliminate the lowest number code...FIRST.Fix that code,clear the codes,testdrive,see what codes return...or not.Lower numbered codes CAN cause higher numbered codes to set.Thats the deal.good luck

If you need those or just one or 2 sensors goto 3si.org someone there iam sure will have some alot cheaper then the parts store , does the car run like crap if your getting alot of codes the ecu in first gen 3s cars have a bad reputation of going out , the capacitors leak down make car do crazy things ,i rebuilt mine when i bought the car about a year and a half ago .Good luck

Yea, the car will shut off after about 15 minutes into driving. Then when I try to restart the car, there is no spark. I have to wait 20 min-an hour before it will start again...then it starts over...10-15 mins of driving and shut down...