Long start?
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Mountain Pass
Joined: Jul 2020
Posts: 178
Likes: 44
Long start?
I am working on a 05 f250 and have been hunting an issue causing a long start. I have replaced stand pipes, dummy plugs, oil rail oil rings and top injector o-rings. Last fall I also replaced hpop and STC fitting. I have pressurized the system with the fitting that screws into the ipr valve port. After replacing the stand pipes and dummy plugs and top injector o-rings I do not hear any air leaking from either side. I am leaning toward a low oil psi issue. I removed the filter and cranked and found the bowl was filling with oil and i can hold the valve in the housing down and it will hold oil. On cold start I am getting about 3.5 seconds crank time. As soon the icp starts to build it starts. FICM voltage is 48 cranking and have FICM sync and Sync for crank and cam. After running and shutting it off it fires right back up.
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Mountain Pass
Joined: Jul 2020
Posts: 178
Likes: 44
I didn't count the seconds but it did it fairly quick. I will pull the filter and check this afternoon. I am either suspicious of the pressure relief for the pump or the pump itself at this point. It is a one owner truck and does not have any history of low oil psi though. It has 148k on it. I was also curious if plugged up oil cooler screen could cause long crank, like maybe it was having to build reservoir or push oil through to the hpop.
Fleet Owner
Joined: Nov 2003
Posts: 27,919
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Usually you can hear a slight "thump" when cranking if you have an issue with pressure/supply of the low pressure oil.
Never a bad thing to check the regulator.
So is the oil level good (this includes not too high)? Fuel diluted oil can cause what you are experiencing, but it should get worse when hot.
Never a bad thing to check the regulator.
So is the oil level good (this includes not too high)? Fuel diluted oil can cause what you are experiencing, but it should get worse when hot.
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Mountain Pass
Joined: Jul 2020
Posts: 178
Likes: 44
Yeah the oil level is good and not fuel diluted. It prob doesn't have but 2500 miles on oil change.
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Fleet Owner
Joined: Nov 2003
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A plugged up oil screen COULD cause a longer crank. So could some trash that went through the IPR screen and is cause a delayed movement in the IPR valve.
At this point it may just be best to simply keep an eye on it for a while.
At this point it may just be best to simply keep an eye on it for a while.
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Mountain Pass
Joined: May 2015
Posts: 128
Likes: 8
From: Cottonwood, California
My truck, a 2005 with 260,000, pretty much all stock, has taken 3 - 3.5 seconds crank time to star since it was brand new.
It has fairly recently had all new injectors and harnesses, new oil cooler, new egr cooler, new icp, new stand pipes and dummy plugs, all new glow plugs and harnesses and it cranks the exact same amount of time as it has since new.
Also two new batteries, a new radiator, water pump and starter.
First start in the morning or a re-start after running a while, cold morning or not, it still takes a bit of cranking for it to catch.
It has never gotten worse so I always figured it was normal for my particular truck.
It has fairly recently had all new injectors and harnesses, new oil cooler, new egr cooler, new icp, new stand pipes and dummy plugs, all new glow plugs and harnesses and it cranks the exact same amount of time as it has since new.
Also two new batteries, a new radiator, water pump and starter.
First start in the morning or a re-start after running a while, cold morning or not, it still takes a bit of cranking for it to catch.
It has never gotten worse so I always figured it was normal for my particular truck.
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