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Don't cali trucks have 2 O2 sensors anyways?


Not sure what year they started on the 3.0, my '90 only has 1, same with my '91 4cyl. I know that in '92 4 cyl.s started coming with 2, I am not sure how long this was done for.


More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed