Calling All F Cam Owners....Please Help

[claytucc3]

My question is: What is your Air/Fuel ratio at idle? I can't seem to get to the magic 14/15. I am bouncing between 18/19 at idle and it goes down to the correct range at throttle. Is this normal for this cam? I know it has poorer idle quality and that the a/f ratio is going to be off but is this normal?

 

[BK_CAULEY]

no its not. and the cam isnt going to throw of your afr's. you need to make sure all sensors are plugged up and working. sounds like an ect sensor problem to me.

 

[claytucc3]

I have already went through all of the sensors. Correct me if I am wrong, but with a larger cam the intake and exhaust valves are open at the same time due to the more aggressive lift. This would in turn throw off the a/f ratio at a slower rotation speed "idle"

 

[claytucc3]

It is also not throwing any codes...the only code it throws is because the charcoal canister purge valve is missing. I went through all of the vacuum lines also.

 

[claytucc3]

Okay, I got the idle A/F ratio fixed finally, the air pump hoses were installed opposite and a custom tune.