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1999 Ford Cobra OBDII PO171or PO174
Posted to Technical Discussion Forum on 9/7/2000 2 Replies

Has anyone run into either one of these codes. No vacuum leaks are present and air flow meter is good. No drivability issuse. Service engine soon light is on. LTFT is -25%. STFT is between -3.25% and +3.00. Login to read more.

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