Rich and Lean AFRs

[Supra_32]

Hey guys,

My car seems to be idling very rich, around 11.7 and the car generally only will cruise at 12 or under AFR.
The problem is when I hit boost it likes to get around 13 which I know isn't that good for the engine.

I am running a .57 for now (about to install a 60-1), Lexus afm, 550s, walbro with 12v, 3 inch intake and exhaust, front mount, greddy profec etc.

Just installed a new 02 oem and the car ran great! Always at 14.7

However 2 weeks later now the car runs really rich and more lean during boost. Generally I am running 12psi.

My question is I have a SAFC coming in the mail soon. What should I adjust or watch for?

Do I need a afpr?

Will my new 60-1 turbo make any difference to my AFR during boost?

Cheers

 

[Nick M]

Do you have the bypass screw all the way out of the housing? That pump will greatly increase the volume of fuel to the injectors and as such, pressure. Did you modify the J-tube?

 

[Supra_32]

No and no. I'll check the afm ASAP and I'm waiting to get a afpr

 

[jetjock]

So you jacked up fuel but left the J Tube restriction in place? I'd be looking there first.

 

[Nick M]

No and no. I'll check the afm ASAP and I'm waiting to get a afpr

I guess my point was you likely have two different things wrong.

 

[Supra_32]

So do I need a afpr right away? How do I get rid of the j tube?