Recent long crank when cold
Thread Starter
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Tuned
Joined: Sep 2006
Posts: 250
Likes: 1
Recent long crank when cold
In the last week been getting long crank to start when cold, I always wait for several seconds after injector buzz and glow light goes out. Would this be more likely the IPR screen or dummy plugs? After fully warmed up truck starts in 1-2 seconds, when cold it takes up to 4 seconds to start. I do have the Scangauge II and also the torque pro app. All readings seem ok but takes longer now to build pressure before starting.
Mountain Pass
Joined: May 2015
Posts: 128
Likes: 8
From: Cottonwood, California
My 2005 with 240,000+ miles has done this since the day I bought it.
Last year I had a new oil cooler, stand pipe, dummy plugs, egr cooler and valve, icp, all injectors, and starter (and I'm sure some things I forgot) replaced and my truck still takes 4-5 seconds to start in the morning,
Repairs were not related to the starting behavior.
Until last year the truck always ran great and it runs great after the repairs but nothing changed at all in regards to its starting behavior since new.
Not sure what this means but in my case it has always been this way and I accepted it as "normal".
Last year I had a new oil cooler, stand pipe, dummy plugs, egr cooler and valve, icp, all injectors, and starter (and I'm sure some things I forgot) replaced and my truck still takes 4-5 seconds to start in the morning,
Repairs were not related to the starting behavior.
Until last year the truck always ran great and it runs great after the repairs but nothing changed at all in regards to its starting behavior since new.
Not sure what this means but in my case it has always been this way and I accepted it as "normal".
Fleet Owner
Joined: Nov 2003
Posts: 27,893
Likes: 3,611
Sometimes the dummy plugs can leak and bleed down when sitting and that small leak can create a longer start when cold.
I was hoping to see what the ICP was for the 4-5 seconds that it didn't start.
It certainly could be injectors though.
I was hoping to see what the ICP was for the 4-5 seconds that it didn't start.
It certainly could be injectors though.
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
Go into the settings and change the update speed to fast. The other option would be to get one of the ELM devices and
the software to run on a smart phone or tablet. Then if you want to do some data logging you have that option also.
Forscan adapter comes in a few flavors and even one that us USB so that you can use a laptop.
Here is a link to the site >>> FORScan
the software to run on a smart phone or tablet. Then if you want to do some data logging you have that option also.
Forscan adapter comes in a few flavors and even one that us USB so that you can use a laptop.
Here is a link to the site >>> FORScan
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Tuned
Joined: Sep 2006
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Thanks for the info, I have Forscan running on pc netbook now. Have entered in 28 pids so far.
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Postmaster
Joined: Aug 2015
Posts: 3,910
Likes: 18
From: NW IA
If you have the wavy oil rails, or the late '04 and up, simply pull the ICP sensor after it's sat overnight or a few days.
If you don't have oil right there under the sensor you are leaking down in the oil rail.
This only works on the passenger side of course, without pulling the valve cover.
Thread Starter
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Tuned
Joined: Sep 2006
Posts: 250
Likes: 1
The ICP builds slowly till 500 psi when it starts, 3-4 seconds, how to determine if it is injector related ?
Fleet Owner
Joined: Nov 2003
Posts: 27,893
Likes: 3,611
Any codes?
My understanding is that ForScan will do an injector contribution test. That might reveal an injector issue.
What oil are you running and how long has it been since an oil change?
Have you tried any stiction additives?
My understanding is that ForScan will do an injector contribution test. That might reveal an injector issue.
What oil are you running and how long has it been since an oil change?
Have you tried any stiction additives?
Thread Starter
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Tuned
Joined: Sep 2006
Posts: 250
Likes: 1
Oil was just changed in Feb this year, 1000 miles on it. Ran the ForScan injector contribution test, it made 2 passes no errors. No codes found. Like I said before, it starts right up when warm, 3-4 seconds when cold in am. Never have used any stiction products. Last oil was Rotella 15/40.
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
I wonder if something like T6 full synthetic 5w-40 would help.
Does ForScan also allow you to run the glow plug test?
Also you could get ICPv right at the ICP sensor by back probing the connector.
Does ForScan also allow you to run the glow plug test?
Also you could get ICPv right at the ICP sensor by back probing the connector.