From 1-wire O2 to a 4-wire O2...help...
07-07-2005, 05:12 PM
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Join Date: Jun 2005
Location: Detroit, MI
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Car: 91' Pontiac Firebird
Engine: 388 ci Small block CHEVY (4.060x3.75), Dart Iron Eagle Platinum 200cc, Performer intake, 454 TBI, Long Tubes, True Dual 3" GPs
Transmission: 700R4, B&M, Governer Recal, 20,000 GVW cooler
From 1-wire O2 to a 4-wire O2...help...
I have searched...
I have a 1991 Firebird w/ a 305 TBI computer and a 1-wire O2.
I installed headers and have a 4-wire AFS75 O2.
The wiring for the 4-wire goes:
A
TAN
1667
Heated Oxygen Sensor (HO2S) - Low
B
PPL
1666
Heated Oxygen Sensor (HO2S) - High
C
BLK
150
Ground
D
BRN
241
Ignition (ON)
QUESTION:
Which one is the signal wire for my computer (to splice into the oem 1-wire wire).
Is it A, B, or AB? <- Not blood type
I have a 1991 Firebird w/ a 305 TBI computer and a 1-wire O2.
I installed headers and have a 4-wire AFS75 O2.
The wiring for the 4-wire goes:
A
TAN
1667
Heated Oxygen Sensor (HO2S) - Low
B
PPL
1666
Heated Oxygen Sensor (HO2S) - High
C
BLK
150
Ground
D
BRN
241
Ignition (ON)
QUESTION:
Which one is the signal wire for my computer (to splice into the oem 1-wire wire).
Is it A, B, or AB? <- Not blood type
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