B2300 OBD 2 CODES #P0171 LEAN , P1443 EVAP PURGE

1996 Mazda b2200

Computer problem
1996 Mazda b2200 4 cyl Two Wheel Drive Manual 227000 miles

what would be the likely causes for DTG's # p0171, and p1443. The truck has aprox 227 k miles on it.

Some uneven idling, some revving to about 2500 rpm
Rick Tweed
August 12, 2008.

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