Lagging start after warm
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Tuned
Joined: Oct 2011
Posts: 269
Likes: 0
From: Albuquerque, NM
Lagging start after warm
Hey fellas,
Within the last week or so, I noticed that my truck makes a flubby sound when I start it. (see vid below). When the truck is cold, it starts fine, I only notice it after I have driven it for awhile, shut it off, let it sit for a few minutes, then try to start it again.
I am getting 1 DTC on my SGII, but no code numbers. FICM voltages are all good, never dropping below 45v. Batteries are 1 yr old, and will drop to 10.4 sometimes during a cold start, but only for a few seconds.Fuel regulator has blue spring upgrade.
This truck has had it's fair share of work done under the hood, all under warranty, however my warranty ran out back in May, so I'd really appreciate any guidance on where to start poking around. I have my fingers crossed it's not major.
<dl><dd>"06 6.0 PSD Hesitating start up - YouTube</dd></dl>
Thanks
Within the last week or so, I noticed that my truck makes a flubby sound when I start it. (see vid below). When the truck is cold, it starts fine, I only notice it after I have driven it for awhile, shut it off, let it sit for a few minutes, then try to start it again.
I am getting 1 DTC on my SGII, but no code numbers. FICM voltages are all good, never dropping below 45v. Batteries are 1 yr old, and will drop to 10.4 sometimes during a cold start, but only for a few seconds.Fuel regulator has blue spring upgrade.
This truck has had it's fair share of work done under the hood, all under warranty, however my warranty ran out back in May, so I'd really appreciate any guidance on where to start poking around. I have my fingers crossed it's not major.
<dl><dd>"06 6.0 PSD Hesitating start up - YouTube</dd></dl>
Thanks
Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
Post these PIDS
ICP
ICPV
IPR%
under the condition below
OPERATING VALUES
Just make shure the numbers are taken exactly like this
Truck in PARK OR NEUTRAL all times during test
ECT at 190* or close to And EOT at 185* or higher
A/C OFF
----------------------------------------------------------------------------------
#1-------KOEO=Key On Engine Off =record EACH sensor value and POST IT!!
#2-------Low Idel (truck idel on its own)=record EACH sensor value and POST IT!!
#3-------High Idel (2500RPM)=record EACH sensor value and POST IT!!
So looking for 3 Values per each sensor
What year are we Talking about
ICP
ICPV
IPR%
under the condition below
OPERATING VALUES
Just make shure the numbers are taken exactly like this
Truck in PARK OR NEUTRAL all times during test
ECT at 190* or close to And EOT at 185* or higher
A/C OFF
----------------------------------------------------------------------------------
#1-------KOEO=Key On Engine Off =record EACH sensor value and POST IT!!
#2-------Low Idel (truck idel on its own)=record EACH sensor value and POST IT!!
#3-------High Idel (2500RPM)=record EACH sensor value and POST IT!!
So looking for 3 Values per each sensor
What year are we Talking about
Thread Starter
|
Tuned
Joined: Oct 2011
Posts: 269
Likes: 0
From: Albuquerque, NM
The sound I'm concerned isn't necessarily excessive cranking, but more of a hesitation or lagging right before the engine roars to life. Unfortunately the video doesn't capture the sound as much as much as you can hear it in person. Sometimes it's worse than others. Even my wife and kids noticed it......they asked me what that weird sound was, and this time it wasn't coming from me
Thread Starter
|
Tuned
Joined: Oct 2011
Posts: 269
Likes: 0
From: Albuquerque, NM
Post these PIDS
ICP
ICPV
IPR%
under the condition below
OPERATING VALUES
Just make shure the numbers are taken exactly like this
Truck in PARK OR NEUTRAL all times during test
ECT at 190* or close to And EOT at 185* or higher
A/C OFF
----------------------------------------------------------------------------------
#1-------KOEO=Key On Engine Off =record EACH sensor value and POST IT!!
#2-------Low Idel (truck idel on its own)=record EACH sensor value and POST IT!!
#3-------High Idel (2500RPM)=record EACH sensor value and POST IT!!
So looking for 3 Values per each sensor
What year are we Talking about
ICP
ICPV
IPR%
under the condition below
OPERATING VALUES
Just make shure the numbers are taken exactly like this
Truck in PARK OR NEUTRAL all times during test
ECT at 190* or close to And EOT at 185* or higher
A/C OFF
----------------------------------------------------------------------------------
#1-------KOEO=Key On Engine Off =record EACH sensor value and POST IT!!
#2-------Low Idel (truck idel on its own)=record EACH sensor value and POST IT!!
#3-------High Idel (2500RPM)=record EACH sensor value and POST IT!!
So looking for 3 Values per each sensor
What year are we Talking about
Ok, I'll set up my SGII and get these readings for you later this morning.
Since I forgot to mention in the first post.......
2006 6.0 PST 4WD CC SRW 67,000 mi.
All filters and caps are OEM. Fuel filters have about 5,000 mi.
I use Diesel Kleen about every other tank.
I'm running Rotella T6 oil (5-40)
Sinister coolant filter.
New EGR Valve/Cooler and Oil Cooler 1 Yr ago (10,000 mi.)
New FICM 11 mo.
Certified Thread Hijacker
Joined: Aug 2001
Posts: 14,441
Likes: 59
Thanks,
The sound I'm concerned isn't necessarily excessive cranking, but more of a hesitation or lagging right before the engine roars to life. Unfortunately the video doesn't capture the sound as much as much as you can hear it in person. Sometimes it's worse than others. Even my wife and kids noticed it......they asked me what that weird sound was, and this time it wasn't coming from me
The sound I'm concerned isn't necessarily excessive cranking, but more of a hesitation or lagging right before the engine roars to life. Unfortunately the video doesn't capture the sound as much as much as you can hear it in person. Sometimes it's worse than others. Even my wife and kids noticed it......they asked me what that weird sound was, and this time it wasn't coming from me
From the video it sounds fine to me.
Josh
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Thread Starter
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Tuned
Joined: Oct 2011
Posts: 269
Likes: 0
From: Albuquerque, NM
Here are the readings from my SGII
EOT 189
ECT 188
KOEO= ICP 0, ICV .23, IPR 14.4, RPM 0
Low Idle= ICP 580-585, ICV .8, IPR 22.1, RPM 687
High Idle= ICP 1500-1600, ICV 1.7, IPR 39-40, RPM 2500-2600
EOT 189
ECT 188
KOEO= ICP 0, ICV .23, IPR 14.4, RPM 0
Low Idle= ICP 580-585, ICV .8, IPR 22.1, RPM 687
High Idle= ICP 1500-1600, ICV 1.7, IPR 39-40, RPM 2500-2600
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Thread Starter
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Tuned
Joined: Oct 2011
Posts: 269
Likes: 0
From: Albuquerque, NM
Just to try and clarify, if you listen closely at about 4.5 seconds into the vid, that's what I'm talking about.
Thread Starter
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Tuned
Joined: Oct 2011
Posts: 269
Likes: 0
From: Albuquerque, NM
Update:
Well yesterday I went and filled up with some fresh diesel, and pretty much immediately I noticed a significant improvement in the start up. The lagging I've been noticing completely disappeared. At this point I'm going to blame the issue on a bad tank of fuel. The problem started right around the same time I filled up last time, and it went away when I filled up this time. So that's good news to my ears.
I'm thinking about replacing the fuel filters again, just to make sure I get rid of any residual crap from the bad fuel, even though I just replaced them 5k mi ago.
My SGII is still reading 1 DTC, but when I run a scan, I don't get any codes. Is this something I should be concerned about? I unplugged it and tried again, to see if maybe it would go away, but it still picked it up??
Well yesterday I went and filled up with some fresh diesel, and pretty much immediately I noticed a significant improvement in the start up. The lagging I've been noticing completely disappeared. At this point I'm going to blame the issue on a bad tank of fuel. The problem started right around the same time I filled up last time, and it went away when I filled up this time. So that's good news to my ears.
I'm thinking about replacing the fuel filters again, just to make sure I get rid of any residual crap from the bad fuel, even though I just replaced them 5k mi ago.
My SGII is still reading 1 DTC, but when I run a scan, I don't get any codes. Is this something I should be concerned about? I unplugged it and tried again, to see if maybe it would go away, but it still picked it up??
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