Where are you measuring a rich condition? Might be worth putting a voltmeter to the output of the O2 sensor to see what it has to say. If the O2 sensor says its flipping from rich to lean regularly, then the engine management is doing what it should do. if it swings from 0v to 1v back and forth, the ECM sees that as a normal mixture. Hanging at 1v is rich, hanging at 0v is lean.
some info on how to test a MAP sensor.
need a meter with frequency reading, or a tachometer to do it. Usually they work or they don't. When the MAP fails, the mix tends to be extremely rich and it runs like complete garbage.
some info on how to test a MAP sensor.
need a meter with frequency reading, or a tachometer to do it. Usually they work or they don't. When the MAP fails, the mix tends to be extremely rich and it runs like complete garbage.
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