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"Wow. How helpful."
Agreed including the sarcasm.
Truth is "lean or rich" isn't meant to help you figure out why it isn't running the way you expect, it is the result of the government (at the time) requiring basic emissions fault recognition, leading to the owner's eventual discovery in the form of a CEL or Check Engine Lamp. Strictly identifying emissions over spec as required. It was in OBD-II, years later, that honest diagnostics began to be available to help your tech zero in on the fault.
One famous misleading bit of OBD-I nonsense is that "injector problem" tag the 113 code got in some manuals. A 113 does in no way indicate an injector fault, and I suppose hundreds of dollars or Euros have been misspent changing injectors based on that misinterpretation. 113 merely means the mixture is so awfully bad even the trim of squirt time can't put it in range. Common reasons are the FPR that you changed, an AMM with a filthy wire, or a dead oxygen sensor.
Bottom line is OBD-1 on your LH2.4 or 3.1 car gives clues to the experienced, but not cause-effect diagnosis like its more modern evolution.
Just make sure the injectors you put in were for the NA, known as Hi-Z or high-impedance as opposed to those for the turbo that require ballast resistors. Wholesale replacement of your injectors with low-Z could have damaged the driver transistor in your ECU, and will of course do the same to another.
Then look for basic reasons the fuel mixture might not be in range giving that 113 DTC.
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Art Benstein near Baltimore
"Why is a birthday cake the only food you can blow on and spit on and everybody rushes to get a piece?" -Bobby Kelton
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