Hard start getting harder
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Senior User
Joined: Aug 2009
Posts: 164
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From: Everett, Wa
Hard start getting harder
My e99 f250 has been getting harder and harder to start over the last year.
I think one of my batteries is dying or dead but it still cranks fast while it does.
For instance when I tried starting today it seemed to crank just like normal but their was some relay clicking inside the cab that was abnormal.
My understanding is aside from cranking no power is required to start the motor? what if the dead battery is taking some cranking amps from the good battery preventing the computer from getting juice?
would the truck throw a code if it was a glow plug?
I think one of my batteries is dying or dead but it still cranks fast while it does.
For instance when I tried starting today it seemed to crank just like normal but their was some relay clicking inside the cab that was abnormal.
My understanding is aside from cranking no power is required to start the motor? what if the dead battery is taking some cranking amps from the good battery preventing the computer from getting juice?
would the truck throw a code if it was a glow plug?
Lead Driver
Joined: Jun 2004
Posts: 6,316
Likes: 582
From: Amarillo, TEXAS!
Your understanding is wrong. These are electronic diesels and there are plenty of things that need power for the engine to start and run. Get the batteries individually load tested and if one is bad, replace them both. Make sure the terminal clamps are clean and free of corrosion.
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Senior User
Joined: Aug 2009
Posts: 164
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From: Everett, Wa
Batteries failed a load test but I still have hard start so I'll start digging.
Post Fiend
Joined: Mar 2015
Posts: 5,277
Likes: 32
From: Blairsville, Pennsylvania
I chased a similar issue a while back. Ended up being the starter, which (fortunately) died in the driveway 
One thing I came across during my troubleshooting is the common issue of the starter bolts coming loose- affecting ground and possibly gear meshing.
Might be something else you can check. Pretty simple to do.
Good luck!
One thing I came across during my troubleshooting is the common issue of the starter bolts coming loose- affecting ground and possibly gear meshing.
Might be something else you can check. Pretty simple to do.
Good luck!
More Turbo
Joined: Jun 2010
Posts: 546
Likes: 1
From: reedsport
I had this issue last week. No codes. Ended up being low oil level. Got lucky. Not saying this is your issue but could be all it is
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Lead Driver
Joined: Dec 2006
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From: San Diego, CA
My last slow start was a two year on again/off again effort that ended up being my starter. Killed both my Optimas dead. I had 12VDC but it just wouldn't crank over. Took them to an auto parts store for their free battery test. 11 of 12 cells were dead.
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Senior User
Joined: Aug 2009
Posts: 164
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From: Everett, Wa
I'm about 400 miles shy of my oil change interval (5k) So I'm going to go ahead and change that but I did pull two codes today .
P0603 — PCED Internal control module KAM error Open PCM pin, disconnected B+, faulty PCM EDIT : Just saw that this is ok due to DPTuner.
P0470 — EBP Exhaust back pressure sensor circuit malfunction Biased sensor, open signal return
As far as rotation speed this sucker is cranking fast.
P0603 — PCED Internal control module KAM error Open PCM pin, disconnected B+, faulty PCM EDIT : Just saw that this is ok due to DPTuner.
P0470 — EBP Exhaust back pressure sensor circuit malfunction Biased sensor, open signal return
As far as rotation speed this sucker is cranking fast.
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westladog
1999 - 2003 7.3L Power Stroke Diesel
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Oct 17, 2006 10:18 PM