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Type: Posts; User: gmcjim

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  1. ok guys you had it right!! Hallalujah! the...

    ok guys you had it right!! Hallalujah! the story starts when i replaced an o2 sensor about 2 yrs ago. just bought the vehicle new y pipe first off, followed by said 02 sensor. fast forward til...
  2. thanks Jim. i should clarify that the o2 will...

    thanks Jim. i should clarify that the o2 will "occasionally" swing into the .600s, at idle only, then when cruising it begins to fall, ending in double digits, like around .015v?? it does show cross...
  3. So, a fresh, bosch 02 sensor didn't do it. The...

    So, a fresh, bosch 02 sensor didn't do it. The was able to test fuel pressure and had 17 at one point then settled down to about 14. brand new fuel pump two weeks ago with new injectors and also a...
  4. Thanks Jim-will do on the oil change. i realize...

    Thanks Jim-will do on the oil change. i realize it is running rich, 7.4 is stupid rich, its just that o2 sensor is reading lean... The injector duty cycle is over 100 at idle...300+ driving around. ...
  5. This is my latest tuner pro log. i think its...

    This is my latest tuner pro log. i think its attached. I have new injectors,fuel pump, fuel pressure reg, IAC,...vacuum slightly shaky at 20 on some ports, steady 20 on other ports. i know its...
  6. Thanks for the response. i believe its working...

    Thanks for the response. i believe its working as it should, seems normal at idle. its just that it stays in the lean range when driving. i know the injectors are dumping fuel. ie bad mileage,...
  7. 1991 lu4 code 44 super low o2 voltage high fuel trim extremly high idc

    Can anyone confirm that if the 02 is showing a voltage range.450-.025 on tuner pro it means its working and properly grounded all the way to ecm? Thanks (Im assuming it is working and showing LEAN.)
  8. Thread: howdy

    by gmcjim
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    2,294

    howdy

    new to forum. just saying hi! thanks for the membership to the forum.

    1991 jimmy LU4 engine.
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