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Excessive/long crank time

I owned a 2014, 2017, 2019, and now a 2023 and the 1st thing a noticed was the longer crank time.
 
My 22 started cranking a little bit longer after the first oil change. I am not sure if they performed an update or not. It is not bad, but I noticed it took a second or two longer than usual.
 
Just traded the 2017 EcoD smaller diesel yes …fired instantly, the new 23 CTD takes 2 secs maybe 3 when cold…seems long to me as well even with no other HD owned to compare to
 
There is a service bulletin for long cranking on some trucks where they replace a bolt on the starter. Not sure if it will help any of you but worth asking about I suppose.
 
Just purchased a late model 2022 3500. If it were my guess I would think the reason for the longer crank time would be a fuel pressure requirement before injectors would open.
I have a 2019 and it fires almost immediately. It does have a S&S CP4 -> CP3 conversion kit.
I’m a comercial vehicle mechanic and deal with various diagnostic scenarios. In these applications, injectors will not be allowed to fire until a specific amount of fuel pressure is achieved (for emissions purposes) thanks Cali. That would be my guess because when ambient temperature is over 58F grid heaters or glow plugs are not even commanded “ON”. Plus, it was 105F when I first cranked it. Still took long.
 
PDR said:
Just purchased a late model 2022 3500. If it were my guess I would think the reason for the longer crank time would be a fuel pressure requirement before injectors would open.
I have a 2019 and it fires almost immediately. It does have a S&S CP4 -> CP3 conversion kit.
I’m a comercial vehicle mechanic and deal with various diagnostic scenarios. In these applications, injectors will not be allowed to fire until a specific amount of fuel pressure is achieved (for emissions purposes) thanks Cali. That would be my guess because when ambient temperature is over 58F grid heaters or glow plugs are not even commanded “ON”. Plus, it was 105F when I first cranked it. Still took long.
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My 22 is my 3rd CP3 equipped HPCR and the crank is much longer.

The CP3 has no issues building pressure almost instantly to fire. It’s something else causing the delay.

In these trucks grid heater activation is based on intake manifold temp, not ambient air temp. I will have to double check the 22 OEM tune, but last I looked the temp for grid heater activation was 66°F.
 
At a 115 degrees in Phx my 2023 still long cranks first start of the day, its not quite as long if I shut it down and turn it right back on, but its still delayed, you would think after a 20 mile tow it would fire right up.
 
AH64ID said:
My 22 is my 3rd CP3 equipped HPCR and the crank is much longer.

The CP3 has no issues building pressure almost instantly to fire. It’s something else causing the delay.

In these trucks grid heater activation is based on intake manifold temp, not ambient air temp. I will have to double check the 22 OEM tune, but last I looked the temp for grid heater activation was 66°F.
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Yes, might be a tune issue? I’d like to try and get to the bottom of it because, long crank times usually mean loss of fuel prime. Hope that’s not the case.
 
I had my 23 in a few weeks ago and they found the software (PCM?) to be outdated. They explained the new version addressed the slow crank specifically. Since having it back, I’ve noticed it being noticeably faster.
 
baker01 said:
I have noticed longer crank time after getting the Y43 recall done
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Interesting, I haven’t noticed a change.

My 24 hour regen timer didn’t reset with the PCM program like it did with ECM reprograms on my 18, so I was thinking none of the engine tuning was changed.
 
AH64ID said:
Interesting, I haven’t noticed a change.

My 24 hour regen timer didn’t reset with the PCM program like it did with ECM reprograms on my 18, so I was thinking none of the engine tuning was changed.
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It could just be my perception, It seemed Iused to get a long crank once out of every 10 or so starts. It is now a longer crank every 3 to 4 starts. As long as it starts I'm not too concerned.
 
FYI, here’s what they did to address mine…

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Sent from my iPhone using Tapatalk
 
@ Work, we have '17, '18, '19, '20, '21, 2x '22, and 2x '23 Cummins and if it was a race for all to hit the start button at the same time and leave the shop the '23s would loooooooooose terribly. I don't know what on earth they did with the '23 crank sequence but everyone I have come across is the same and it's terrible. Maybe they weren't selling enough starters and they want to wear them out quicker?
 
kaiwodw87 said:
@ Work, we have '17, '18, '19, '20, '21, 2x '22, and 2x '23 Cummins and if it was a race for all to hit the start button at the same time and leave the shop the '23s would loooooooooose terribly. I don't know what on earth they did with the '23 crank sequence but everyone I have come across is the same and it's terrible. Maybe they weren't selling enough starters and they want to wear them out quicker?
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Maybe they wanted more oil pressure before it started who knows
 
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