Picked up a 97 ranger 2.3l with 5 speed, 256k miles on it about a month ago. Ran great for about a week then cel came on. got a reader and came up with 2 codes.
P1131 Lack of HO2S11 Switches - sensor indicates lean
P0302 Cylinder 2 misfire
Wasn't misbehaving to bad so I cleared the codes out and did some maintenance on it. Put a can of seafoam in the tank to clean out the junk.
This past sunday I started it up and took it for a small warm up run, got fuel then went back home, changed the oil, oil filter and air filter, fired it up and went out for a small drive. Took off fine but as soon as I let off the gas it died.
Pulled over and tried cranking it over, nothing. Waited a minute and tried again and it fired right up. Had to feather the gas everytime I came to a stop sign to keep it alive untill I got it home. Checked all my connections and everything looks good. Took it out again and if I get it up to normal temp it will keep running, has a miss but wont die on me. Pulled codes again and now I'm getting a new one.
P0420 Catalyst System Efficiency Below Threshold (bank 1).
Anybody have a clue?
Thanks in advance.