5SFTE Rich as hell....., only when its cold Options

[batcavee00]

guys just wondering if theres anything i can do to regulate my a/f mixture when the car is still cold. im getting readings of 10-10.5 a/f ratio when its cold. its like this until it warms up. when nits nice and warm, my ratios are good, 14.7 at idle.

i know when the car is cold it takes the reading from the o2 sensor to manage the fuel and when its warm it uses the map sensor.
so is there a way to trick the car into always using the map readings instead????

im using 460 injectors, stock fpr, and SAFC2

thanks!

This post has been edited by batcavee00: May 1, 2012 - 2:34 PM

[Culpable04]

when is cold, it shoud be running richer, some cars use an extra injector to add extra fuel to help the engine start during cold weather, ( 4th gens had this and maybe 5th gens as well ) our cars just come mapped to dump extra fuel on the 4 injectors to help the engine start, once it warms up the reading would be normal again. you can try replacing the O2 sensors to improve your A/F at idle a little but expect to always see the readings on the rich side when is cold.

dont try to " fool " the o2 sensors, and dont do changes to your fuel map ( assuming you are tuned for your turbo ) during cold weather, because once it warms up, your reading will be very off and could blow your engine. all tuning has to be done at operating temperatures.