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Timing specs on GM 350 R Motors Are Set At 0. If You Removed The Distributor There Should Have Been A Paint Mark On The Rear Either Yellow Or White. If You Did Not Line This Mark Back Up You Will Need A Scan Tool Capable Of Giving You The CMP Retard. This Will Be Displayed in Timing Degrees. CMP Stands For Camhaft Position Sensor. If The Timing Exceeds about 10* It Will Flag The Check Engine Light. Note If The Timing Is Off and Distributor Was Not Moved Check The Drive Gear. These Like To Apple Core Around 150000 Miles. Also Make Sure When You Adjust The Timing Keep The RPM over 1000* or CMP will Not update. There Is No EST Bi Pass Wire to Worry About Anymore.Just Watch CMP Retard With RPM over 1000 And Adjust Distributor.

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Q: Timing specs for 1997 Chevy suburban 350 5.7 vtech motor?
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