Was sure a $9 fuel cap gasket was a waste, but it fixed a hard start on my 7.3 after 6 months of chasing it

Dylan Williams · 2026-10-15T23:05:04.217276+00:00

I kept blaming glow plugs and even dropped $140 on a new set before a guy at the shop in Tulsa asked if I'd checked the cap seal. Two days later it fires up cold on the first crank, so what's the cheapest fix that ever fooled you?

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Was sure a $9 fuel cap gasket was a waste, but it fixed a hard start on my 7.3 after 6 months of chasing it | Diesel Mechanics - Topic Shares