All P's and U's

mannyz · 08-23-2022, 09:40 AM

OK guys here we go, let me give you an update. I was ready to discard the car and sell it. Just reset the computer and sell it. But stupid me I decided to take it to the dealership thinking that they have the tools and knowledge to find out what the heck is wrong with the car.

Well after I explained what is wrong with the car and what I have done to the car already, and argue with the mechanic. They took the car in and told me that they need at least 2 hours of diagnostic and that will be $500 which I agreed. But I always had this hint in my head that the previous owner may have done some tuning to the car, so I ask them that if they cannot find what is wrong with the car to go ahead and reflash the ECU or ECM.

A week later they called me telling me that they went through the Nissan list and everything I replaced was part of the to do list (which was my previous argument with the tech) so they skipped all that, and they check the harness which came out fine and that the only thing left was the ECM, but they cannot access the ECM, they told me the ECM was defective. So they quoted me a used ECM for $3,000. Of course I told them I am not spending $3k on that car.

So I went pickup the car with the idea that I will clear the codes and sell the car (sorry for the next owner). Brought the car back home and spoke with a friend of mine that used to tune Mitsubishi cars. He also was thinking there was something wrong with the ECM, maybe it was tuned and locked from modifications. So he found me a used ECM for $100 (not $3,000).

I installed it, then he called a Lockemisth for me that will link the key to the new ECM for the immobilizer and guess what. 3 months later and I have no problems. I've been driving the car to break it and throw codes and everything is working fine. I am happy again and now I can continue with my projects on the car.

So for those people with these type of codes and that already replace coils, VVEL Modules and stuff, if you purchased a used 370Z maybe try reflashing the ECM, if not get one from another vehicle.

08-23-2022, 09:40 AM	#6 (permalink)
mannyz Enthusiast Member Join Date: May 2009 Location: Orlando, FL Posts: 354 Drives: a car Rep Power: 280	OK guys here we go, let me give you an update. I was ready to discard the car and sell it. Just reset the computer and sell it. But stupid me I decided to take it to the dealership thinking that they have the tools and knowledge to find out what the heck is wrong with the car. Well after I explained what is wrong with the car and what I have done to the car already, and argue with the mechanic. They took the car in and told me that they need at least 2 hours of diagnostic and that will be $500 which I agreed. But I always had this hint in my head that the previous owner may have done some tuning to the car, so I ask them that if they cannot find what is wrong with the car to go ahead and reflash the ECU or ECM. A week later they called me telling me that they went through the Nissan list and everything I replaced was part of the to do list (which was my previous argument with the tech) so they skipped all that, and they check the harness which came out fine and that the only thing left was the ECM, but they cannot access the ECM, they told me the ECM was defective. So they quoted me a used ECM for $3,000. Of course I told them I am not spending $3k on that car. So I went pickup the car with the idea that I will clear the codes and sell the car (sorry for the next owner). Brought the car back home and spoke with a friend of mine that used to tune Mitsubishi cars. He also was thinking there was something wrong with the ECM, maybe it was tuned and locked from modifications. So he found me a used ECM for $100 (not $3,000). I installed it, then he called a Lockemisth for me that will link the key to the new ECM for the immobilizer and guess what. 3 months later and I have no problems. I've been driving the car to break it and throw codes and everything is working fine. I am happy again and now I can continue with my projects on the car. So for those people with these type of codes and that already replace coils, VVEL Modules and stuff, if you purchased a used 370Z maybe try reflashing the ECM, if not get one from another vehicle. Knio, Rusty, Optimiser and 4 others like this. __________________ Last edited by mannyz; 08-23-2022 at 09:42 AM.