Well I wish I had good news for you guys. I spent all day up at the shop. After everything done mechanically to it we still had the EXACT same issues aas before. Obviously I plugged in my uprev and grabbed DTC but no codes showed up. I checked and realised that this car did not have a battery cover piece (not just the cover the whole trim that covers the IPDM and cabin air filter) and I could see straight down to the ECU. Fearing the worst I pulled the ECU and it was most certainly fried, most likely got water seeping inside of it. I got an ECU from an 04 g35 MT and had the BCM married to it. This is what I got from uprev BEFORE having the ECU married to the BCM.


DTC from first start with ECU **UNMARRIED**

After having the ECU married to the BCM I still had P1564 and P0506 showing up, even after clearing the codes multiple times. I honestly have no idea what to do at this point, as of now I have a $7k paperweight in the shop and the ONLY thing I can think of is the flywheel is somehow f***ed and preventing the new motor from idling. Please, anything that anyone could suggest would be GREATLY appreciated. Even my mechanic has no idea what could be wrong.

EDIT: I realised that this ECU had been pulled from a g35 which had cruise control, so having P1564 is to be expected.

Thanks in advance
~Nick

 

This is the biggest oof I've seen here but I'm with you on feeling the pain brother....
Hopefully you can get some guidance from @dkmura @MicVelo or @itsLeon

 

Here's a compilation of the issues I've had.


The clips are a touch out of order, the second clip should be the first.

 

Not sure that I have any constructive advice after reviewing this thread and the video in the last post. I hope the OP picked up this much abused Z for a song, as there's a boatload of work to make it run properly again. It all comes down to gumption (which was a term used in Zen and the Art of Motorcycle Maintenance) and how much you have to continue to work on this project car. I think most of the DIY stuff has been covered already, and it's time to bring in a pro shop when you can afford it. This is not a project that will be solved via keyboard instructions. .

 

Put it in rice?

 

Man....I don't even know what to say. That poor Z, such a shame that someone would put it through so much abuse. You've already done all of the things I would've thought of and then some. A pro will be needed to get things sorted. I am curious about the new DE you put in it. Did you source a longblock? Did it include sensors and fuel injectors? Seeing as you had diesel in the tank, I can only guess that you still have fuel delivery issues. Perhaps the fuel lines or injector rails are clogged up if you're still using the originals.
-Icer