are these AFR readings normal?

[oplix]

When I start my car I get a reading of 14.7 while it's idling. After it warms up and I drive it a while, if i come to a stop it's more like 11.5-12.0 at idle.

Is this normal? Driving around it's usually between 11.5-12.5 afr. At WOT it's usually 10.0

this is on a stock fuel system. 450cc injectors. (don't mind my profile mods i haven't installed pump/injectors/safc yet)

 

[Gstclipse69]

When I start my car the wideband sits at 14.7. After it warms up it goes to lean at idle. Driving around you should be around 14-15. If I'm at a very slight throttle it tends to be at 15-16. At wot throttle most people shoot for 11.0. The stock fuel map is rich so it will say 10.0 until you do some tuning. How is your gas mileage? To answer your question you are too rich while driving around. I would check for boost leaks. I had this same thing happen to me, running way too rich while at part throttle, and I had a big crack in my stock rubber intake pipe. Give your engine bay a good look over.

 

[oplix]

I have a boost leak at my throttlebody. I am buying new gaskets tomorrow and hopefully it will fix it. Sounds like you are right though it is probably the boost leak which is causing it to run so rich.

is your car on the stock fuel system? I'm only asking as it relates to the factory fuel maps.

 

[anteversion]

I have a boost leak at my throttlebody. I am buying new gaskets tomorrow and hopefully it will fix it. Sounds like you are right though it is probably the boost leak which is causing it to run so rich.

is your car on the stock fuel system? I'm only asking as it relates to the factory fuel maps.

Thats playing with words but its more likely a vaccum leak in your case, cause rich readings are occuring while your not into boost situation

 

[oplix]

hm I don't think so my vacuum is pretty normal -17 at idle

 

[Gstclipse69]

My mods are in my profile, but I run fic 650s. The fuel maps may be different from stock but non-the-less you are running too rich at part throttle. Check all your vacuum lines, vacuum caps, and anything pre-turbo as well. As far as throttle body gaskets, I replaced those but as it is now I just rtv'ed them.

 

[oplix]

could you maybe find me a diagram for the vacuum lines?

 

[1gDSM4g63]

2g vacuum diagram.

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[anteversion]

hm I don't think so my vacuum is pretty normal -17 at idle

17 is little low at idle. normally its more around 19. But anyway you cannot tell that you dont have a vaccuum leak with your boost gauge since its taking its reading at the throttle body. The leak should be between the turbo outlet and the TB.