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How do you adjust timing on a 96 Chevy 350 5.7 liter vortec engine?
Wiki User
∙ 10y ago
Basically, You cannot set timing is correct... But, turning the distributor serves only to adjust what GM calls the cam retard offset. Actual ignition timing is controlled by the PCM, based on the information it receives from various input sensors. To adjust the cam retard offset, connect a scan tool to the DLC. Bring the engine to operating temperature, then hold it steady at 1000 rpm. Monitor cam retard offset on the scan tool. It should be 0 2. To compensate for a negative reading, rotate the distributor in a counterclockwise direction, To compensate for a positive reading, rotate the distributor in a clockwise direction. Recheck the reading after tightening the hold-down bolt. It may change. Also note that attempting to retard the cam retard offset reading outside the recommended range will not cure spark knock, and may cause the PCM to store a diagnostic trouble code.
Wiki User
∙ 10y ago
Wiki User
∙ 12y agoThat requires an obdII engine scanner.
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