help air/fuel ratio

red96stang · April 27th, 2009, 12:52 PM

my air/fuel ratio on the left bank is 20.7 at idle but gets a little better with more rpms and it has blue/white smoke at idle and low rpms i have a code that says my o2 isnt connected but i checked it and it seems ok and think i have bad exhaust valves dont know what to do??

97stanggt · April 27th, 2009, 01:30 PM

Blue/whiteish smoke usualy signifies burning oil i think maybe valve stem seals are bad? and maybe 02 is bad also? get a live scan scanner where you can view the o2 readings and see if its sending anything if not its time for a new one

Trick Tuners · April 28th, 2009, 01:19 PM

If you are burning oil you can coat the O2 sensors and they will not work right. Typically a car wont idle above about 18:1, and if it does it will barley chug along. I suspect the WO2 has a bad sensor as well. Do a leak down test to see whats up.

red96stang · April 28th, 2009, 03:07 PM

i just put the new sensor in about a week ago and i think the wires are crossed on it so im going to take it back and get another but it hasnt smoked like this since i put in the new sensor..

April 27th, 2009, 12:52 PM	#1
red96stang Regular 1996 gt 97cobra boltons Join Date: Feb 2009 Location: north carolina Posts: 99 iTrader: 0 reviews	help air/fuel ratio my air/fuel ratio on the left bank is 20.7 at idle but gets a little better with more rpms and it has blue/white smoke at idle and low rpms i have a code that says my o2 isnt connected but i checked it and it seems ok and think i have bad exhaust valves dont know what to do??

April 27th, 2009, 01:30 PM	#2
97stanggt Regular 1997 Mustang GT Join Date: Feb 2009 Location: South Dakota Posts: 299 iTrader: 0 reviews	Blue/whiteish smoke usualy signifies burning oil i think maybe valve stem seals are bad? and maybe 02 is bad also? get a live scan scanner where you can view the o2 readings and see if its sending anything if not its time for a new one __________________ ____________________________________________ 97 Stang GT 5sp 5.4L SOHC 96 F-250 Stroker -=-Modded-=- 08 Kawasaki Brute Force 7504x4I Selling PI Cams/NPI intake Alum Cross/4.6L LongBLock minus Oil pan and most of the timing cover bolts.

April 28th, 2009, 01:19 PM	#3
Trick Tuners MM Fanatic KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 4,471 iTrader: 3 reviews	If you are burning oil you can coat the O2 sensors and they will not work right. Typically a car wont idle above about 18:1, and if it does it will barley chug along. I suspect the WO2 has a bad sensor as well. Do a leak down test to see whats up. __________________ Check out my forums for stuff on troubleshooting, tuning, etc We teamed up with Socal Performance Racing to bring dyno tuning to San Diego. Be friends with us on FB

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April 28th, 2009, 03:07 PM	#4
red96stang Regular 1996 gt 97cobra boltons Join Date: Feb 2009 Location: north carolina Posts: 99 iTrader: 0 reviews	i just put the new sensor in about a week ago and i think the wires are crossed on it so im going to take it back and get another but it hasnt smoked like this since i put in the new sensor..

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