Vehicle starts ok, but becomes richer and richer as it warms up. Both air and coolant temp sensors read normal both at sensor and at ECM. I do not get the usual .2 to 1 volt output at O2 sensor. I get steady 4.5v. We also have 2 other 1989 and 1988 Jeep Cherok...

FIX posted 6/6/1999

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