Hooked up my air fuel ratio gauge and its reading 10.0 at idle and around 70mph it reads 11.4 i know I might be wrong and correct me if I am but shouldn't it be around 14.7 at idle? How do I lean the car down I got an aem ems I was thinking that's how but I'm not sure in what setting that would be I need some help! Thanks guys

 

There are several very good tuners near you. I would make a call to them. If you are having issues finding the start map/idle map on your AEM, I wouldn't be trying to tune via internet advice.

 

yea, 14.7 is stoich, but depending on the mods you're running, you may want to run a little bit richer. What mods do you have?

 

A rough guideline for AFR's should be:

Idle = 13.5 - 15.0:1 AFR, this would depend on your injectors, cams, etc.. to achieve smoothest idle.

Cruising, low/med RPM's = 14.5 - 15.0:1 AFR

Cruising, high RPM's (>5000) = 13.8 - 14.2:1 AFR

0-vac / entering boost = 12.5 - 13.0:1 AFR

Full boost = depends on your setup and fuel, but usually 10.5 - 11.5.1 AFR on gasoline

 

Could be the sensor for the AFR, they don't last long. If you put it on a dyno, it will tell the truth.

 

I run pump fuel and I have a few mods but my fuel system was upgraded its a double pumper walbro fuel pressure regulator. My car looks like a diesel truck when I take off haha