Car ideas funny shuts off and wideband is way off (only with turbo hooked up)

[Luderacer14]

I ran without the turbo for the last few weeks and it runs fine, wideband reads accurate and the car idles smooth. I hooked the turbo back up yesturday and it ideas funny and runs really rich. But my wideband stays at max lean . When I decelerate, it reads max rich. I'm signing over the title to my friend today, ANyways, a couple of months ago, I would drive and all of a sudden it goes super lean and bogs. This is all under NO boost at all. Any ideas? Car shuts off at idle sometimes too. Could it be my MAF, or my wideband? I'm running 370cc on 10psi tuned with a safc2. Cureently pushing 5 and it still does the same thing, any ideas, Turbo i'm running is a t3/t04, boost kicks it at 4000. This haappens under no boost or super light throttle.

[crzycav86]

That seems very strange. Just wanted to point out that those injectors were quite a bit too small for 10psi on that turbo.

The wideband reading max lean might be an exhaust leak. It will also have lean readings if your spark plugs arent firing. What's the spark plug gap? You might wanna check them.

As far as running rich upon deceleration, I have no idea. Did you richen up your safc due to your "lean conditions"? It's supposed to read lean while decelerating. Maybe the sensor is screwed up.

[Luderacer14]

I maxed out the injectors running no boost and it still read max lean. I never had a problem with my T3 setup, but after installing the t3/t04, it began to run weird. But i'm gonna check for an exhaust leak.

[nissanfanatic]

Sounds ignition related. Misfires usually show up on the wideband as leanness. Pull your plugs and check resistance on your coil.

What is your complete setup?

[GEO]

yeh, make sure alll safc settings are right, even for the correct maf

[nissanfanatic]

And are you open atmosphere BOV? Dec air settings.

[Luderacer14]

I'm running open atmosphere, the decel is correct, Anyways, i don't get it, it was running fine, all of a sudden, it keeps reading lean, ocassionally at a low idle, it would work. But the wideband is always on max lean.

[Jookmasta]

which wideband are u using? whats ur gap at?