Better cold starts with a 7.3 glow plug relay upgrade
If you're tired of crossing your fingers every time the temperature drops below forty degrees, a 7.3 glow plug relay upgrade is probably the best fifty bucks you'll ever spend on your truck. We've all been there—sitting in the cab of a Ford Powerstroke, watching that "Wait to Start" light, and hearing nothing but a pathetic click followed by the sound of a starter motor struggling to turn over a cold, grumpy engine. The 7.3-liter diesel is an absolute unit of an engine, but its Achilles' heel has always been that factory glow plug relay. ...