Slow crank / Rough start up idle - Ford Powerstroke Diesel Forum
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post #1 of 10 Old 12-10-2012, 08:23 AM Thread Starter
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Slow crank / Rough start up idle

So with the cold season here my truck has been experiencing some new symptoms on startup. I haven't been plugging it in yet just because our temperatures have stayed 30-40 degrees.

On startup after sitting for the night the crank is very slow, probably 1 second per crank. It takes about 7-10 seconds of cranking to start up at times(my buddies 06 6.0 has sounds like it has 5cranks/second). After I drive it for a little and try to start it up immediately after the hard start symptom usually goes away except the crank is still 1sec/crank. The battery has died acouple times while trying to crank it when cold.

On the initial slow crank startup the truck will blow white smoke briefly (3 seconds?) and idle very funky/rough. The engine's loud 6.0 knock isn't prominent until about 20 seconds of sitting.

Batteries replaced (at different times in a year)
New alternator (3rd one in a year)
Had new gaskets/egr delete, etc serviced 6 months ago
Glow plug harnesses were changed

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post #2 of 10 Old 12-10-2012, 09:14 AM
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Batteries need to be load tested, perform ficm check procedure. Bad batteries kill ficms, quickly. Batteries must be changed in pairs. You need a monitor. Check out ficmrepair.com, your probably going to need it.

Sent from my phone that somebody didn't help me get.

Unfortunately had to Sell my ......2004 KR CC SWB FX4 - Edge insight cts, blue spring upgrade, updated HFCM drain plug, XDP coolant filter, CAT EC-1 rated coolant, Custom Diesel EGR delete, CAT delete, Rotella T6

SEE MY OIL COOLER REPLACEMENT AND EGR DELETE - http://www.powerstroke.org/forum/gen...tml?highlight=
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post #3 of 10 Old 12-10-2012, 09:16 AM
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Here....Write Up: Monitoring the 6.0L PSD.

Sent from my phone that somebody didn't help me get.

Unfortunately had to Sell my ......2004 KR CC SWB FX4 - Edge insight cts, blue spring upgrade, updated HFCM drain plug, XDP coolant filter, CAT EC-1 rated coolant, Custom Diesel EGR delete, CAT delete, Rotella T6

SEE MY OIL COOLER REPLACEMENT AND EGR DELETE - http://www.powerstroke.org/forum/gen...tml?highlight=
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post #4 of 10 Old 12-12-2012, 07:03 AM Thread Starter
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Alright update... She starts hard in the morning, and after it warms up from sitting at work for 9 hours she starts fine. I got home and she sat for 8 hours over night with the drop in temperature the and wouldn't start this AM. I took a clunker to work and had my mom take the truck to get the batteries tested.

The driver side battery failed the test, I think they said output was 811?
Passenger side battery passed.
Alternator passed.
Starter passed.

When my mom got the truck tested it had been running for 20 minutes and well warmed up. When she turned the truck off down there and tried to start it back up at one point, it wouldn't start. So I'm going to replace the battery and go from there. (Could glow plugs be at fault for this too?)

FICM hasn't been checked yet. I have the SCT xtreme programmer, does any one know if that can monitor FICM voltage?

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post #5 of 10 Old 12-12-2012, 07:32 AM
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Originally Posted by Deiboe View Post
Alright update... She starts hard in the morning, and after it warms up from sitting at work for 9 hours she starts fine. I got home and she sat for 8 hours over night with the drop in temperature the and wouldn't start this AM. I took a clunker to work and had my mom take the truck to get the batteries tested.

The driver side battery failed the test, I think they said output was 811?
Passenger side battery passed.
Alternator passed.
Starter passed.

When my mom got the truck tested it had been running for 20 minutes and well warmed up. When she turned the truck off down there and tried to start it back up at one point, it wouldn't start. So I'm going to replace the battery and go from there. (Could glow plugs be at fault for this too?)

FICM hasn't been checked yet. I have the SCT xtreme programmer, does any one know if that can monitor FICM voltage?
Unfortunately changing one battery is a bad idea, the "old" one will drag the new one down. These trucks are hard on batteries, not sure about your sct.

Sent from my phone that somebody didn't help me get.

Unfortunately had to Sell my ......2004 KR CC SWB FX4 - Edge insight cts, blue spring upgrade, updated HFCM drain plug, XDP coolant filter, CAT EC-1 rated coolant, Custom Diesel EGR delete, CAT delete, Rotella T6

SEE MY OIL COOLER REPLACEMENT AND EGR DELETE - http://www.powerstroke.org/forum/gen...tml?highlight=
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post #6 of 10 Old 12-12-2012, 07:53 AM
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Change both batteries and be ready to do the alternator again. A bad battery will kill the alternator as well. Once both batteries are replaced have the FICM tested .....you can kill it quick with a bad battery.

2007 XL CC,DRW,4x4.
6.0 Woes


When I die I wanna go peacefully in my sleep like my Grandpa, not screaming in terror like the passengers in his car.
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post #7 of 10 Old 12-12-2012, 08:20 AM Thread Starter
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I'll change both batteries then go from there... argh.. the alternator AGAIN? Thats the 4th one this year!

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post #8 of 10 Old 12-12-2012, 08:22 AM
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Just keep an eye on it. The bad battery is what has been killing alternators.

2007 XL CC,DRW,4x4.
6.0 Woes


When I die I wanna go peacefully in my sleep like my Grandpa, not screaming in terror like the passengers in his car.
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post #9 of 10 Old 12-12-2012, 12:58 PM Thread Starter
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Alright question, I just had a battery replaced 3 months ago. Should I still replace both?

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post #10 of 10 Old 12-12-2012, 01:06 PM
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Quote:
Originally Posted by Deiboe View Post
Alright question, I just had a battery replaced 3 months ago. Should I still replace both?
Probably, or you might be back to where you are now, i'm sure your ficm isn't healthy either.

Sent from my phone that somebody didn't help me get.

Unfortunately had to Sell my ......2004 KR CC SWB FX4 - Edge insight cts, blue spring upgrade, updated HFCM drain plug, XDP coolant filter, CAT EC-1 rated coolant, Custom Diesel EGR delete, CAT delete, Rotella T6

SEE MY OIL COOLER REPLACEMENT AND EGR DELETE - http://www.powerstroke.org/forum/gen...tml?highlight=
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