Originally Posted by TheSteve

So I've been driving the car for the past month or so and everything is working pretty well. I don't think it's going to pass emissions though. I keep throwing codes for system too lean, and my OBD scanner is showing the fuel trims both maxed out at +25%. Of course, the Nissan ECU can't actually do anything with fuel since the Haltech handles everything, but I can't pass emissions with the check engine light as it is. AFRs are right at 14.7, so I know there is actually no correction needed. How should I take care of this? I could build a quick circuit to make the factory sensors always show the correct voltage so that the ECU doesn't think anything of it, but I don't know if that will actually work.

Originally Posted by Cux350z

quick test, no good!

Ran it first on the suspect harness.....maybe should have run it on mine first since my car hasnt been run for a month or two. Car ran like crap. I was hesitant to leave it running for long without my widebands hooked up at all, much less not even talking to the haltech. It would rev but it was rough!!!
Trying to decide what I want to do about the widebands. I could convert both harnesses and my wideband over to delphi metripacks and test that way.

Then i ran it on my harness, she cranked and idled down nicely.

Noticed a smell of gas in the garage and a bit of haze. I also had the drives side fuel tank interior cap off (the one behind the drivers seat inside the unused space where a bose sub could be) but i have never smelled gas that much.

I really want to know what is inside the brick. None of the injector outputs were shorted to ground when i ohmed them out.

Originally Posted by binder

That doesn't make any sense. Reset the ecu or something. Corrections will be handled with the haltech so it shouldn't be showing maxed unless the tune for the haltech is off.