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92 F150 fail emissions, code 173
Posted to Technical Discussion Forum on 1/27/2003 6 Replies

1992 Ford F150 4.9 6 cyl. VIN: 1F5DF15YXNNA22540 KOER code 173: O2 always rich

Timing set to spec. 10 Fuel pressure: 49lbs. MOD says 45 to 60

O2 has been replaced, but always runs rich at idle. Will fluctuate at higher rpm sometimes, sometimes not. Checked... Login to read more.

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