SAFC II tuning. Car idles fine, then dies.

ONLY for ADVANCED technical discussion about the 240sx!
User avatar
otterman
Posts: 3380
Joined: Tue Feb 21, 2006 5:43 pm

Post

On a redtop SR.

Here's my set up.

Cylinder set to 4, arrow up

Sensor 2 in 6 out

I've got a Z32 wired up. The car starts up fine and idles fine for a little bit then dies.

When it starts my wideband is reading 13 (stoichish). then when it starts to die it jumps to 17 (lean).

I havn't messed with anything other then just the intial set up.

Is this normal? I really dont think it is but maybe I have to adjust the settings before the car will run right. Anyone know?



wankelTII
Posts: 128
Joined: Sun Oct 15, 2006 3:03 pm

Post

what computer are you using to run that engine and did it run fine before you installed the SAFC? Check your connections, solder them if they arent already.

If connections are your problem then look for directions on how to solder (more than one sorce is always better) and get a 150-400watt gun (not weller or weller style), you should be able to find a nice gun for $30-$60. Practice on a few pieces of wire outside the car!

User avatar
onosqv
Posts: 5675
Joined: Wed Aug 07, 2002 12:32 pm
Car: '92 240sx Vert
Contact:

Post

Have you tried just stock maf + safc ii yet to eliminate the possibility of anything wrong w/ the z32 maf side? Just makes things simpler in my opinion.

Given that your wiring is correct, that should be really the only thing... good luck!

User avatar
otterman
Posts: 3380
Joined: Tue Feb 21, 2006 5:43 pm

Post

So double checked all the wiring. Resoldered everything. Still starts up leans, out and dies.

So I decided to mess with the settings because I remember reading on here that some people had to change their settings cause SAFC II is weird like that sometimes. I changed the sensor from

2 in, 6 out which is what redtop SR with z32 is supposed to be

to

1 in 6 out

Now it idles fine. A little lean around 15. I havnt been able to actually drive the car because of the weather so I dont know how it does other then idle and revving it.


Return to “240SX Technical Forum”