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#1 |
Registered Member
Join Date: Feb 2002
Location: Jacksonville, FL
Posts: 706
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![]() Today (raining) my right 02 started reading richer than hell 5.0vdc (which is max) and then, winding down slowly to about 1.5 vdc at cruise (2500 rpm @ 70 mph)...
the left does the same as always, boucing btwn .2 vdc - .7vdc (I know .46 is ideal but these are factory sensors, the wideband is going in this w-end) any guesses? I'm taking it apart tomorrow...
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1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy |
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#2 |
Registered Member
Join Date: Oct 2005
Location: Sabana Grande, Puerto Rico
Posts: 33
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![]() Either the O2 went fubar (shorted thimble to heater, internal), or you have a short to power or VREF somewhere in the wiring. The O2s don't use 5vdc reference voltage, they produce their own. My 2¢.
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ACRONYMS: LUK=Let Us Know, GL=Good Luck, LMK=Let Me Know, JIC=Just In Case, BTSTDTRT=Been There Seen That Done That Repaired That and the classic... DILLIGAS=Do I Look Like I Give A S*** 1986 Mustang GT w/T-Tops ![]() NOW: 5.0L Stock SB, X303 Cam, 700 cfm DP Holley, 289 '66 Heads, 1.7 RR, Richmond Gear 4+1 Tranny, Centerforce DF, 2.73 Gears WIP: 3.90 Gears, LS Overhaul, Adj. LCA's & UCA's (Granatelli), T-Top weather striping and rear braces bodywork ![]() |
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