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A/F ratio gauge wacking out

Started by Paul G, March 31, 2016, 08:05:42 PM

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Paul G

March 31, 2016, 08:05:42 PM
Installed this Summit brand A/F ratio gauge last year. Same as an AEM. Took the Charger to work today and noticed the gauge reading all dashes across the read out. It would come back to a normal read in the 13's, then go all the way to the lean side and show all dashes again. It kept doing that, then just stayed all the way lean. Repeated this on the way home.

Is this a normal failure of an O2 sensor? It is only 1 year old.
1972 Charger Topper Special, 360ci, 46RH OD trans, 8 3/4 sure grip with 3.91 gear, 14.93@92 mph.
1973 Charger Rallye, 4 speed, muscle rat. Whatever engine right now?

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cdr

#1
March 31, 2016, 08:24:58 PM
it could be the sensor, but probably not.  sensors usually last 50k 70k miles
LINK TO MY STORY http://www.onallcylinders.com/2015/11/16/ride-shares-charlie-keel-battles-cancer-ms-to-build-brilliant-1968-dodge-charger/  
                                                                                           
68 Charger 512 cid,9.7to1,Hilborn EFI,Home ported 440 source heads,small hyd roller cam,COLD A/C ,,a518 trans,Dana 60 ,4.10 gear,10.93 et,4100lbs on street tires full exhaust daily driver
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toocheaptosmoke

#2
April 01, 2016, 11:14:27 AM
Had a bosch O2 sensor foul out after about a year exactly as you're describing.  Tried cleaning it and recalibrating it but no-go.  My fuel mix was VERY rich at times while dialing in the carb, that's the only reason I could figure for such an early problem with it? 
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