need help. new setup having issues

[srdub-t]

Ni just got done with my new turbo setup witch is top mount gt3071r and i started it open turbo to see if evreything is cool and it runs super super rich like straight black smoke and it revs fine but once it drops the car dies and then its hard to start again. Heres what i think the problems could be:

1. i also just installed a z32 maf whitch im pretty sure i wired right because i had the color coded pigtale but i dont know if my chasis ground is good.

2. im running an safc2 and i changed the sensor type to 2 in 5 out whitch is what i was told was the correct setting.

3. i also just installed an enthalpy ecu witch i bought used but paid for a retune.

4. theres no o2 sencor hooked up but i dont think that thats sucha big deal.

so i just need to know if this is a common problem or is my safc set wrong or do i absalutly need an o2 sencor with an enthalpy ecu?

thanks
Modified by srdub-t at 1:34 PM 9/17/2007

[silvia tech]

When I have run this setup I run my safc at 2 in 4 out. If you read the manual it tells you in should be half of out. Take no offense I would venture to say that you maf wiring is off. It is probably reading incorrect airflow and the computer reads this airflow and dumps a retarded amount of fuel. check your wiring or umplug your maf. The computer will go into limp mode but that will help you identify the culprit. Also be cautious how long you run the car. With it dumping that much fuel it could be getting in the oil. Fuel in oil is horrible for bearings.

[92SR20S13]

Well with no o2 your running in safe mode..which means hella rich..get a wideband and tune off of that!

[srdub-t]

well i unplugged the maf already and it idle a little bit better but it still runs really rich. i dont think that it being in safe mode would cause it to run this rich. Also im pretty sure the maf is wired right because it was color coded but there is a chasis ground on the pigtail that i wasnt sure about so ill try putting that in a better place. Thanks for the help well see if this fixes my problem. Also i was searcing and i guess another issue could be that my maf is to close to my turbo inlet but with topmount you cant go as for as people suggest cuz it wont clear?? right now my setup goes turbo with a little 45 degree bend (guessing about 3 inches) then maf.
Modified by srdub-t at 12:01 PM 9/15/2007

[silvia tech]

yes, it can be the turbo because if the maf is too close to the turbo, it creates a distortion, the suction does that is. Think of it this way imagine your car is a vacuum cleaner, that is what motors do convert air to power. then imagine the maf is too close to the tube coming from the vacuum , turbo inlet. Instead of the maf reading the air that is actually entering the turbo it is reading the actual pull from the vacuum cleaner. I generally wire my 2 ground wires together to the single ground from the harness instead of going to the chassis. Next go to pep boys or napa or advance and purchase a fuel pressure gauge and some fuel hose and a brass T. This will allow you to measure your fuel pressure.

[srdub-t]

how far away does the maf have to be from the turbo because im top mount and theres only so much i can go.

[karmakaze]

did you not have enthalpy tune for your maf?

if you have an enthalpy tune, and no wideband, why in the hell do you have the SAFC?

[srdub-t]

not to sound rude but if you read my first post i said that im open turbo right now so theres no way that the wide band that i do have will get a reading. im just trying to figure the problem out before i take my car to a shop to get my new downpipe fabricated, the bung for my wideband was on my old downpipe also so i have to get that welded on to. i just want to get everything figured out because im goin to tow my car to the shop thats gonna do my downpipe and i want to drive it back.

With that said yes my ecu is tuned for a z32 maf so according to apexi support website i should set it at 2 in and 2 out.

again i wasnt trying to be rude, you have helpd me out before and i appreciate it, i just dont like when people judge without knowing

[turbomrdeuce]

so my maf is like 8 inches away tops. dont you guys think thats far enough? and its for sure somting to do with the maf

[turbomrdeuce]

srdub u posted off my name when you were at my house. People are gonna get hella confused lol

[srdub-t]

my bad. no suggestions anybody? When i unplug the maf it idles fine but its still a little rich, when i plug it in its extremely rich and barely idles untill it finally dies. Also this is what enthalpy said for the o2 situation: Boost level and altitude are both handled by the maf sensor and the stock Nissan management system. This does not depend on the O2 sensor. Your tune is setup to take advantage of an O2 sensor. If you do not have one connected, the ECU will just read directly from the fuel map without closed-loop feedback. So, with or without the O2 sensor, you'll be fine. You'll just get better fuel economy if you have one.

Thanks,Chris @ RS Enthalpy

[Wilmer787]

MY car had a similar problem, I resolved it conecting both maf grounds to the harness ground, and it runs perfect, another thing I have in my car is the maf pressurized on the throttle side piping and I feel the car better running it with an apexi neo. here is a little video of my car.http://youtube.com/watch?v=zaC8Qho5x2w

[srdub-t]

he i figurd my maf out but now my car feels the same as my old setup no were as fast as it should be and after i took the ride i noticed that my peakboost manifold was glowing red, so im gessing timing but i cant figure the correct way to time an sr, im searching how right now.

[sx_hatch]

just take that old sr out and put one of these in there

[srdub-t]

just wait till i get this stupid sr running right and then ill show you wussup

[sx_hatch]

yeah right ok

[turbomrdeuce]

just take that old sr out and put one of these in there

i heard that this new version of the sr makes even less power