Description High-altitude calibrated Stanadyne DB2 mechanical injection pump for 1983-1987 Ford F-Series and E-Series trucks running the 6.9L IDI diesel. Tuned for the thinner air, leaner fuel ratio, and reduced cold-start enrichment that high-altitude trucks need to stay smooth and smoke-free. Mechanically identical to the standard DB2829 platform, calibrated differently. If your truck lives consistently above ~5,000 ft and the original pump came from the factory with the high-altitude calibration sticker, this is the right replacement — running a standard-altitude pump up high causes black smoke, rough idle, and EGT swings. Features High-Altitude Stanadyne DB2 Pump Leaner Fuel Calibration for Elevations Above ~5,000 ft Direct Bolt-On — Factory Lines & Mounting Mechanical Injection — No ECM or Electronics For Stock-Power 6.9L IDI Trucks Part Number: DB2829-4542 Notes Wrong pump for sea-level trucks — black smoke and a rough idle are the first symptoms of running a high-altitude pump at low elevation. If your factory pump tag does not say "HA" or include the high-altitude callout, use the standard-calibration DB2 instead. This is a repair and return item, you must send us your core to send to to Industrial Injection for rebuild.
