1993 Toyota 4Runner code 25 and 26

Tiny
ALAINUYPO
  • MEMBER
  • 1993 TOYOTA 4RUNNER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 240,000 MILES
Code 25 and 26, I have already replace the 02 sensor and the water temp sensor, I still have the same problem after clearing the code, I ahve also check the cold start injector reading, 02 sensor reading it seems to be working, engine runs rough and sluggish, I'm thinking about giving it a complete tune up, cap, rotor, plugs, wires, and also maybe the engine computer, please help any advice I will appreciate it , thank you
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Tuesday, July 8th, 2008 AT 12:03 AM

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Tiny
KHLOW2008
  • EXPERT
Hi alainuypo,

25 and 26 = lean and rich mixture.

It has something to do with the rough running, engnine hunting.

I would suggest checking for vacumn leakages, high or low idling speed(throttle body clogged), IAC, MAP and spark plugs.

Should not be the ECM.
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Tuesday, July 8th, 2008 AT 2:22 PM

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