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cummins 5.9 QSB compression and pump timing
Posted to HD/Fleet Forum on 9/30/2024 1 Reply

I've been fighting this for a couple months now. Issue is hard start cold. Did a compression test with the following results #1= 455, #2= 475, #3=470, #4=425, #5=550, #6=550. Book says min spec is 300. These all look good enough to me but have forgotten most o... Login to read more.

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