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lean


  1. Pesky P1131 on B2500

    Hello Everyone, First time posting, but I have been reading and getting a lot of help from here for awhile. I have a 2000 Mazda b2500 4 Cylinder 2.5L Manual with a P1131 code. My understanding of this code is that it is a lean reading at the upstream o2 sensor. Noticeable symptoms are...
  2. 3.0 Banks 1 and 2 too lean

    Hello, I recently purchased a 99 Ranger 3.0 Flex Fuel with about 184,000 miles. When I purchased it it had a fairly bad misfire on cylinder, it was noticeable at idle and driving. I have since replace the plugs and wires, ignition coil and the injector on cylinder 3, all helped a little and the...
  3. 1987 2.3l lean/rough

    Hi all, My 2.3 suddenly lost power (didn't quit) here a few days ago. Dist was worn inside on contacts, replaced. New plugs and wires as well. Confirmed spark on all 4 cylinders. Checked pulse on injectors 1, 2 and 3, electrical good there. New low and high pressure pumps, confirmed they work...
  4. My 2.3L with MOOG cc866 coil springs...

    Just installed Moog's cc866 coil springs today on my '93 Longbed 2.3L. These are rated for the 3.0 and 4.0 V6 trucks. I wanted as heavy as I could get to attempt to counter "the lean". (a battery move is next) I had read on this site that the expected ride would be much stiffer, however, it...
  5. jlb0716

    Running Lean

    about a year or so ago I fabricated a cold/ram air intake with parts I purchased at autozone. since then my check engine light has been on and its because the engine is running lean at terminal 1, which is the O2 sensor before the cat. has anyone else had this issue? Im trying to decide if i...
  6. Engine running lean???

    I've recently replaced the EGR valve and the tube on my 4.0 and now I am getting a few engine codes... 1. Bank 2 sensor 1 slow response, 2. Bank 2 too lean, 3. OBD test incomplete. The O2 sensor is switching from rich to lean and I don't see any damage on the wires. Is there supposed to be...


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