Here are the stats, 95 240sx, 93 KA block, 300zx injectors, ka-t setup, s-afcII controller.

My car starts, and will idle but once it starts to warm up it dies, and if you give it gas it dies, then you can smell that its running too rich, then you have to wait to let it air out before it will restart. Just started doing this, wondering what some possible things to look for would be, or maybe some tests i could do to help narrow it down, a leaking injector maybe?, i tried compensating on the Apexi unit but so far not much luck. I just noticed that one of my wires going to my IAT sensor wasnt hooked up so i'm fixing it right now, but i'm wondering if this might have anything to do with it. Any ideas would be greatly appreciated. Thanks!

 

any reason why you swapped out the 270ccs? you could try an n60 mafs. i would reccomend putting the 270ccs back in or getting the car on a dyno with a wideband and "tuning" with your safc

 

the car was running fine with the new injectors for alongtime, it just started doing this

 

More than likely you can possibly have a slight manifold leak somewhere.
My friend Evan (NemeGuero) in zilvia had the same problem a few month's back and found out that it was his intercooler that was dropping manifold pressure.
It could also be one of numerous vacuum lines that you don't have capped off.
If the turbo is bad and isn't spooling properly the same problem can happen.

 

if i did a fuel pressure test would this rule out the injector?

 

any further thoughts?

 

the only thing that will rule out injectors is a flow test.

 

what about the o rings on the injectors?

 

could the front O2 sensor be causing this? Just recently about the same time this started happening, i cant say for sure, my narrowband (i know i know, its just a fancy lightshow) started acting weird and showing strange results, running super lean then bouncing. The narrow band is tied in to the front 02 sensor so if the narrowband is seeing this, the ECU must be seeing it aswell, so what i would be asking is... would this be enough to account for the problems i described earlier?

 

get it on a dyno with a wideband

 

yeah that was my original thought but then i got to thinking, i just dont want to spend the money for a tuning session if there is something else at fault going on. No sence in getting there, paying the fees for one run just to have the guy say "damn your setup is running really rich, and we cant compensate for it with the fuel controller, you must have something else going wrong here"

then i'm back to where i started but alot lighter in the wallet

 

well narrowbands are not trustworthy at all, you should just think of them as a dress up gauge. imo it's better to go ahead and pay a few hundred to see if it is actually running poorly or if it's just a faulty gauge. can you tell that it runs more rich? ie more dark smoke under wot? smell? residue on bumper? what is your turbo setup anyhow?

 

Yeah i know its running rich because you can smell the fuel and the car is flooding and stalling out, so its not really an issue of whether the guage is telling me something is wrong, i already know something is wrong, so the real question is why? i'm thinking that maybe the recent flareup in the narrowbands actions might point me in a certain direction. But i hear what your saying and i appreciate the help thus far!

 

It could be the MAF is bad, or the O2.
If you know the O2 sensor is old I would get a new one and test the rest from there.

 

New discovery:

if i pull off the fuel line so there is no pressure on the injectors it will fire up?!?!