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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

How to determin if RICH or LEAN OBD1 & Scope

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Old Feb 19, 2020 | 06:10 PM
  #1  
Fermin4's Avatar
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From: Texas
How to determin if RICH or LEAN OBD1 & Scope

Hi,newbie and looking for help on how to determine if I am running rich or lean. 1995 4Runner 3VZ_E
It has OBD-1 and I have no access to scanner for OBD-1. I own and old Snap-On Brick 2500 but do only OBD2.
Bought cable for OBD-1 to OBD-2 but cartriddges
However I have Picoscope Scanner and all basic DIY tools.

Help is appreciated, I have lack of power and no codes by the ECU after a few parts changed.
Can I hookup the SCOPE to the DLC and readthe O2 sensors?
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Old Feb 19, 2020 | 09:26 PM
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From: Colorado


Here is the generic version.

​​​​Yea you can monitor the oxygen sensor's output with a scope.

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