I am still chasing a no start in my 300D TURBO when engine got a cold soak overnight when temps are in the teens. All 5 glow plugs are good (each one checked with a digital ammeter- drawing over 20 amps surge, 15 amps after it gets hot.). Battery is a 3 mos old Duracrap I mean Duralast. I took some voltage readings at the glow plugs with negative lead on an injector hardline and and positive lead on a glow plug 6 mm nut. When first energized, it reads 9.4 volts, as they get hot, the voltage climbs and end at 10 volts when the glow plug relay clickes off. Do these voltages look good or are they low indicating either a weak battery or wiring?

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
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