Cranking Time:
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Cranking Time:
Gentlemen:
Thanks for the replies to my last post!
I have heard that cranking time varies with a Powerstroke. Hypothetically, let's say that you live in Florida, you have a '97 Powerstroke with 132k miles on it, tight engine (almost no oil use and shudders on shutdown), 15W-40 oil, and your batteries test good under isolated 100 amp load, and you have a new starter and a good charging system. Your cranking time has gone from 1-3 seconds to 2-5 seconds, still fires each time. You found one bad glow plug with a test light. Is this enough to up the cranking time as described?
Follow up: How long should it crank with no glow plugs in a Florida summer, till it fires? I've heard 3-4 seconds average, but I don't know if this is with or without glow plugs.
Thank you for your indulgences. Mentally, I have the yo-ho-ho but no bottle of rum....
Cauchy
Thanks for the replies to my last post!
I have heard that cranking time varies with a Powerstroke. Hypothetically, let's say that you live in Florida, you have a '97 Powerstroke with 132k miles on it, tight engine (almost no oil use and shudders on shutdown), 15W-40 oil, and your batteries test good under isolated 100 amp load, and you have a new starter and a good charging system. Your cranking time has gone from 1-3 seconds to 2-5 seconds, still fires each time. You found one bad glow plug with a test light. Is this enough to up the cranking time as described?
Follow up: How long should it crank with no glow plugs in a Florida summer, till it fires? I've heard 3-4 seconds average, but I don't know if this is with or without glow plugs.
Thank you for your indulgences. Mentally, I have the yo-ho-ho but no bottle of rum....
Cauchy
Playing in the Dirt
Joined: Oct 2005
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From: Southwest Georgia
I live in SW Ga., my cranking time with no glow plugs is 1-3 sec. Every once in a while it will take 3-4 sec.
It takes 1-2 sec. for the starter to turn the engine over fast enough to build oil pressure in the HPOP (has to be approx. 500 psi) to fire the injectors. Hence the term "Winding up a Diesel".
Alot of things can affect cranking time, battery cable condition, connections, heat, starter drag, compression, oil condition, HPOP condition, fuel filter, injector condition, wiring and connector condition, injector o-ring condition, the list goes on.
I have gone to a dealer with 8-9 brand new identical trucks and have started all of them and them can have different cranking times.
It takes 1-2 sec. for the starter to turn the engine over fast enough to build oil pressure in the HPOP (has to be approx. 500 psi) to fire the injectors. Hence the term "Winding up a Diesel".
Alot of things can affect cranking time, battery cable condition, connections, heat, starter drag, compression, oil condition, HPOP condition, fuel filter, injector condition, wiring and connector condition, injector o-ring condition, the list goes on.
I have gone to a dealer with 8-9 brand new identical trucks and have started all of them and them can have different cranking times.
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Thanks. I figured it was particular to the vehicle but I needed a rule of thumb to go by. My batteries are around 3-4 years old so far as I know, and though they test OK at 100 amps, they may not have enough power to to turn it fast enough to fire it as fast as they used to.
Cauchy
Cauchy
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It may be OK - the truck never left me stranded until Tuesday, and then I think it was because I didn't have one set of battery terminals tight on the post - though the nut was tight - and I took 2 short trips Monday night. Prior to that I replaced the starter, which upped the cranking speed, the fuel filter, the glow plug relay (which crumbled when I put a wrench to it) and the CPS. Still no signal on tach when cranking. I think batteries are marginal not at 100 amps but under a real starting load, and a bad glow plug as well.
Cauchy
Cauchy
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