Starting issues - Diesel Truck Forum -
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post #1 of 4 (permalink) Old 01-02-2020, 02:49 AM Thread Starter
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Starting issues

Hello all!

Anyone had a crank sensor go bad? Truck is running great but Iíve had some starting issues. Nothing major until a few nights ago. A little back story; I started having cold start issues initially, which I diagnosed, confirmed, and replaced a bad glow plug relay. However, even after replacing glow plug relay itís been harder to start than usual, regardless of temp, but seems to be worse in the cold. I do live in Montana so it is COLD, but my truck started like a champ last winter even if it wasnít plugged in. Fast forward to new symptom, a few nights ago after turning it off for about 15mins or so, it wouldnít restart. Engine was still plenty hot, it sounded like air in the lines, just cranking over and no start. Started once briefly and sputtered out after priming(again like air in the lines). Primed again to 6lbs positive pressure, cranked over several times, finally started and ran perfectly the next 1 1/2 hours home, then restarted after getting home with no issues. Thereís no visible leaks, fuel filter head has been rebuilt, almost the entire fuel system is practically brand new, has a lift pump, doesnít seem to be actually loosing prime. Iím thinking crank sensor, but Iíve always thought a crank sensor would be no start period. No check engine light, I havenít scanned it yet for any pending codes. Itís also intermittent so far, I havenít had any no start issues since, just slow starting. Iím really trying to get to the root of the problem, not just throw parts at it. Any experience, or suggestions on troubleshooting appreciated!
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post #2 of 4 (permalink) Old 01-10-2020, 12:28 PM
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Sounds like you have to rebuild your fuel primer.
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Sarah Schaffer (01-10-2020)
post #3 of 4 (permalink) Old 01-10-2020, 04:21 PM Thread Starter
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No, itís already been rebuilt and Iím not losing prime
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post #4 of 4 (permalink) Old 01-23-2020, 11:36 PM
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What is your rail pressure with the key on when it's not starting?
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cold start, crank sensor, no start, slow starting

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