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1991 Pickup 4x4 2.4 wiring

618 views 4 replies 3 participants last post by  DCM 
#1 ·
Hello!
Looking for info on where the upstream header-mounted O2 oxygen sensor is supposed to be connected.
Any help greatly appreciated.
THANK YOU!
The Old Guy 06
 
#3 ·
I've not been able to find the the 89-95 truck section, please be so kind as to send me a link.
I am wondering now if our '91 has a non-91 engine in it.
Do the 1991 2.4 engines have just one O2 sensor, or a second one in the exhaust manifold?
Ours has two but no obvious place to connect the upstream exh manifod sensor.
Thank you!
The Old Guy 06
 
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