7.3L Powerstroke Cold No Start Diagnosis- Glow Plug Relay
You can buy the new relay here- http://www.amazon.com/gp/product/B000... The #1 reason a 7.3l will not start cold, followed by a close second being stiction issues with the HEUI Injectors. In this video we show how to test the Glow plug Relay for proper Operation. Ford Motorcraft Glow Plug Relay Part# DY861

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