7.3L Powerstroke diesel – Rapid cold start reliability

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) along with factory glow plug relay and plugs, valve cover harnesses, and a remanufactured alternator. Batteries are Optima red topsContinue 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”

Engine oil leak at cold start | OBS 7.3L Powerstroke oil cooler replacement

After a month of winter traveling at high elevation in Utah, truck developed a nasty oil leak at cold starts. Leak goes away after reaching operating temp, yet continues to weep oil after shutting down and cooling off. The 7.3L Powerstroke’s oil cooler is a tubular heat exchanger between engine oil and coolant along theContinue reading “Engine oil leak at cold start | OBS 7.3L Powerstroke oil cooler replacement”