Shiboh

I think I have found the issue. Engine was being flooded beyond belief. The spec zcar depot told me to input for fuel is way too high. After messing with the settings I found that 19lb/hr at 20psi for the injectors seems to be where it needs to be. I had to set AFR as high as I could. Fuel trim to -8 on every setting.Car runs much better and will rev to redline, however it's still extremely rich and backfiring still stalling if i use too much throttle. And @NewZedmy map reading does go up with throttle, it just stays high at idle. I have no way to plug the cylinder head temp sensor to my new ecu so I will probably call zcardepot tomorrow and ask them about these missing connections, if they know anything. And @silverado22c that makes sense, I'll have to fix that asap. Thanks for your replies ya'll I appreciate the help.

@NewZed I bought the kit with the intention of cleaning up the power band really, the engine ran great before, but would stumble and lose power under load. I narrowed it down to the ecu. Thanks for your insight on those connections. So that plug on the dizzy is only for timing retard when cold, is that needed? And my MAP sensor is actually reading more than .5 atmospheres at all times.

@silverado22c The only things I removed from the car were the ecu and everything that plugs into it, including the dizzy connection to the ecu and connection to oil sensor, which I thought this kit would have replaced. The efi harness is one piece so I don't know how I could have messed with the ignition harness. And as far as I know this engine has never had any work done to it besides normal maintenance, and the harness looked like it hadn't been touched since the factory. In order to run those connections back to their origins I would have to splice into the new harness, but the new ecu doesn't read either of those signals. I think I'll just wire up the sensor directly to my gauge if that will work. And I did add the new O2 sensor, however in the process I found a huge exhaust leak at the header, so it probably doesn't help much at the moment.

@madkaw Well there is still a connector plugged in to the cap of the dizzy which I assume is part of the ignition harness or something. The plug I removed was attached only to the EFI harness.

Just bought the FAST EZ-EFI kit from Z Car Depot for my 1983 280zx. Put it on my car the other day and it runs worse than it ever has. Car will idle but is very hard to start and really rough when it's running. Using any more than 1/4 throttle will stall the engine. When I am able to rev the engine it's terribly rough. Feels like or an ignition timing issue. I know that when I removed the old EFI harness I disconnected a connector going into the distributor and the new harness did not have a connection to plug back in to the dizzy. Since adding the EZ EFI, ignition timing has retarded itself about 10 degrees at idle. Advancing timing does not help the issue. I have setup the ECU with all the correct parameters listed with the info from zcardepot. ECU doesn't throw any codes, all readings seem mostly normal for not being tuned. It feels like it could be a vacuum leak or vacuum not hooked up correctly as well however my vacuum readings are perfectly normal. Has anyone else has this issue? I will add pictures of the engine in it's current state along with the connections that were left unplugged when adding the EZ EFi kit, Including the oil temp sensor. Does this stuff really get left unplugged?