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bret	01-20-2010 03:19 PM

Ingition Timing at Altitude

Have 89 Full Size Blazer, 5.7, Auto, 4x4, TBI. What should ignition timing be at 5000 ft. elevation? Book reads 0 degrees.Is this for sea level?

swartlkk

01-20-2010 03:28 PM

Base timing should be set straight up. The ECU will modify timing as it sees fit based off of the MAP sensor reading.

*moved to Fullsize tech*

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