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car running extremely rich

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Simonsaysr1

Proven Member
135
11
Jan 30, 2016
Rocky mount, North Carolina
my car is running extremely rich (9.5-11) it starts up fine,sometimes around 13.5 ish and as soon as it warms up the idle drops and it riches out to 9-10 usually solid at 10. i ran a log and found my 02 to match my afr cross referencing it to voltage(if the afr was rich it would read .9v and lean .2ish). up to stop lightsaround2k rpms casually dropping down to 1k. as i was driving maybe not even a mile down the road i hit boost at 50 to75 % throttle. and right after that it seems to drop down into the 10s on my aem afr gauge . as i keep going it starts to sputter and hit 9ish on my afr gauge. could this be a bad o2. i tried to take the isc out of the equation by unplugging it , and i still get the same results ,except now it flucuates idling.
 
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