Persistent Code 32

[Metacom]

I've had a shop that deals primarily in Z cars taking a look at a persistent code 32. The EGR valve its self tested fine, solenoid replaced, tubes cleaned.

Code 32 would still pop up, so we thought it was the EGR temp sensor that has gone out causing the ECU to think the EGR valve wasn't working if the sensor wasnt reading hot gas. We replaced the EGR temp senor and still get a code 32 when all things related to the EGR have been verified working/replaced. So the tech took a multi meter to it and discovered that the wire from the ECU to the EGR temp sensor connector wasn't within the expected OHMS.

No we're thinking that the wire has been damaged somehow or the ECU is messed up. Attempting to get a replacement ECU right now and see how that works.

Question though is; from my understanding that if the EGR temp sensor wasn't reading correctly the ECU should put up code 35 (EGT Temp sensor) and since the signal from ECU to the EGR temp sensor connector is damaged or whatever...why would it throw code 32 instead of 35?

My Z is a 94 TT, checked model number under VIN inside the engine bay and it is a federal emissions car. As the 94+ (93+?) all came with EGR temp sensors, not just cali cars, I dont think it has the wrong type of ECU in it but I can tell someone has messed with it or replaced it before. The part number on it now pulls up under the Jim Wolf Tech ECU ID list a late 94 TT FED emissions. My Z was manuf. in 11/93.

I'm about to just do the resistor trick in the connector as my inspections are coming up, but I'd always rather fix the issue instead of bypass it. Any ideas?

[t.mcginley.jr]

If you aren't in Cali, I would suggest bypassing it completely (as in delete the whole EGR valve). But since you already paid for all that work I guess that would be pointless. My bet is on the ECU being the problem, the JWT ecu might not even be using the EGR circuit since most people delete them anyway.

[Metacom]

Fortunately the tech at the Z shop is awesome and stands by his work. No extra charges incurred trying to track the issue down.

The JWT ECU's, what makes them different from stock Nissan ECUs?

[t.mcginley.jr]

Basically any aftermarket ECU is just a stock ECU with a different eprom chip installed. The eprom chip is what controls the fuel mapping, ignition timing, A/F ratios, stuff like that. Basically everything that would be in a "tune".

When you order one of these ECU's, you tell them what mods you have and also what deletes you have done. Since most people delete the EGR valve, this particular ECU could have been programmed to ignore the EGR valve. Did the JWT ECU come with the car when you bought it? or did you buy it from someone else?

[Metacom]

Came with the car when I bought it, but as far as we can tell everything else on the car is stock well expect for the ECU now. A18-B54 MJ4 is the part number currently in.

Looks like replacing that ECU is the next best step since it was messed with...they even broke the screw on it...