Tag Archives: glow plugs

7.3L Powerstroke diesel – Rapid cold start reliability

06:50 outside of Capitol Reef National Park, Utah 14* Fahrenheit (-9* Celsius) ambient temperature Elevation 5200 feet (1580 meters) Cold starts taking longer, requiring several glow plug cycles, and also first notice of an oil leak originating from the oil cooler in the mornings. In this video, am running Motorcraft 15W-40 synthetic oil (https://amzn.to/39hTMX8) alongContinue reading “7.3L Powerstroke diesel – Rapid cold start reliability”

CEL P1391 & P1393 |OBS 7.3L Powerstroke | Glow plugs, valve cover gaskets & wiring harness, glow plug relay

Addressing check engine light for DTC’s P1391 and P1393: Glow Plug Circuit Low Input Bank 1 & 2. Started by replacing all 8x Motorcraft glow plugs, but after checking resistance of each plug, found them all to be acceptable, low ohms.  Went ahead and checked resistance of new glow plugs and installed all new. Next,Continue reading “CEL P1391 & P1393 |OBS 7.3L Powerstroke | Glow plugs, valve cover gaskets & wiring harness, glow plug relay”