Anyone can tell me why?
 

Hello, I am sorry if my question is stupid!

I went to dyno my Z today and the guy told me that my car is a bit lean or AFR lean? If my spell is right? What is that mean? Can any one explain to me plz? He said that it might does a little damage to my engine!!! He told me that the AFR should around 14 and my one is a bit low or something? and he ask me to buy a ECU flash to tune the engine!! I am really confusing? Don't know what is it mean?

I have FI CBE system, Stillen G3, Berk HFC on my car.

Afr= air /fuel ratio

Running lean means there is too much air, relative to the amount of gas coming in.


It is not uncommon to need a tune after installing your mods, and you may pick up some power.

Post up the dyno with afr if you have it.

Ya once you do those mods exhaust and intake you need to look into doing a tune. You want everything to run smoothly in your vehicle not to mention you will pick up some extra ponies.

Get a Uprev and have it personally tuned for best results. You'll be really happy with your ride after.