Truck died while driving yesterday. I was approaching an intersection and let off the pedal when I hit the go pedal the RPMs dropped to the floor and she wouldn't start. EOT 200 ECT 198. Pulled over and she cranked and cranked and wouldn't start. Wife picked me up and I let her sit for a while. She cooled off and she fired right up and I drove her home. She drives like there is nothing wrong. This morning I went out and tried and she fired right up again. Looks like I have a hot start issue.

This morning I took some readings
ICP KOEO - 0
Cranking- I saw 1400 for a second
running- 812

ICV KOEO- 0.23
running- 0.99

IPR% KOEO- 14.4
running 24.6

I pulled the harness on the ICP. If the ICP goes will I see oil in the harness?The harness looked clean but I was confused by some other posts that i read.

Recently did an upgraded FICM. Blue Spring and Switched to Rotella T6 synthetic. This morning I checked my oil dipstick and I was lower than I remember from when I did my last oil change (2 weeks ago and she is my daily driver). So I looked under the truck and I didn't see any pooling or anything on the ground but there was some wet oil on the front of the bell housing on the tranny. So I reached up around the firewall and there was a tiny bit of wet oil around there. This stuff may be irrelevant but I thought I would put all known information. I need some thoughts or ideas on what I need to look at next. What do you guys think?

 

Your ICP sensor looks good to me IDK

Mine ICP went out the other day Blew oil threw it and out the electrical connector but didnt really Leak noticably untill I unplugged the sensor and got it to start that way



Take all those Readings again when Hot and next time do a High Idel check to (2500rpm)

how much oil did you put in it the other day??????????

are you 110% positive that you have OEM Oil filter cap???

 

OK. I gotta go to work tomorrow so I will have a chance to take the readings again when hot. I'm assuming the High Idle check is taking the readings while revving to 2500RPM?

When I did the oil change I filled to about the 3/4 mark on the dipstick. When I checked today the mark was above the minimum mark but just barely.

I'm not 110% positive of the OEM cap. I am 110% positive of an OEM filter and it snapped into place nicely. Is there a part number or is it labeled under the cap somewhere? I don't see anything on top.

Thanks again Blade...I was reading your post about your ICP issue and I got confused about where and when I would see oil. I didn't read up on it until she had already cooled off so I didn't get a chance to try pulling the harness and starting her up. I will post back tomorrow.

 

Dont drive it at least till the Oil Leak is PINPOINTED


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
-------------------------------------------------------------------
KOEO=Key On Engine Off =record value
Low Idel (truck idel on its own)=record value
High Idel (2500RPM)=record value
And the last set of numbers are sensor operating range. If it falls out of this range I beleive a DTC/CEL will be set.



I dont think you ICP is cause Hot-NO-Starts


Can you Post a Pic of the Oil Cap take it from the side so we can see how Tall it is

Your Symtoms Point to the STC Fitting Blowing out and it sounds Like it cracked the rear Cover of engine and thats the Leak

The Engine may Have to come out on this One if Im right andd the rear cover Cracked pullen engine is the only way to replace rear cover maybe they can get it with the trans out IDK

I also wouldnt drive it anywhere


Sorrey I didnt have any Good News and probably the last thing you wanted to Hear pullen moter



Check the Top Valley engine for oil leak to oil pressure sensor by oil filter might blown threw and leak to IDK

Alot of oil leaks really alot of leaks end right where you are talking

 

The plot thickens....I was able to recreate the hot no start issue. I had to drive her shes my only vehicle...I know I'm rolling the dice. EOT was 202 and she cranked for 10-15 seconds and wouldn't turn over. I went and pulled the ICP harness and she fired right up, and was able to get home. When I got home I turned her off and plugged the harness in and she fired up no problem....weird. I also didn't see any oil in the harness. So i took some more readings

EOT was 198 ECT 195
KOEO
ICV- 0.22
IPR- 14.4
ICP- 0

Low Idle
ICV- 0.81
IPR- 22.1
ICP- 581

2500 RPM
ICV- 1.34
IPR- 35.2
ICP- 1270

I unplugged the harness and replugged it in several times starting the truck in between each plugin/unplugin and she started no problem each time.

Here is my oil cap


I got under the truck and didn't really see any new oil. I checked the dipstick and it was right where I left it yesterday.

any thoughts?

 

maybe the harness is the one tats going out?

 

Oil Filter Cap is GOOD OEM

Wheres that EGR Valve

Man when you said ICP did NOT have Oil Blown threw to the wire harness side I did kinda write that Off as Good

Plus you Posted ICPV at .23volt what is Also Good For the Electronics side of the sensor

Now IDK


These sensor readings you just posted were they taken during the No start

 

They were taken after I got her home. She no started on me while I was out working. I pulled the ICP and she fired right up. I got home and plugged the harness back in and took the readings. I should have taken readings during the no start but I was too focused on getting her home. I' m going to take a vacation day and take the wife to work tomorrow and go get a new ICP and get it installed. Do you have the part number handy?

 

That how my ICP sensor acted last week

Came out to go to work NO START I only cranked about 8seconds New something was up Set the scangauge to ICP & ICPV & IPR% & FPW tried again ICP was 100-200psi range ICPV at .09 & IPR% at 77.8% & FPW=0

I saw that and just stopped didnt have time to mess with it

That night I unplugged ICP and Boom started up and ran ICP Defaulted to 1800psi

The ICP Pigtail ws Oil Soaked So that was a Positive ID on a BAD ICP sensor


Maybe yours Has a Internal Glitch IDK you havent said nothing that points to bad ICP EXCEPT Unplug ICP and started right up so worth a shot

<TABLE style="WIDTH: 438pt; BORDER-COLLAPSE: collapse" border=0 cellSpacing=0 cellPadding=0 width=584><COLGROUP><COL style="WIDTH: 221pt; mso-width-source: userset; mso-width-alt: 10788" width=295><COL style="WIDTH: 12pt; mso-width-source: userset; mso-width-alt: 585" width=16><COL style="WIDTH: 110pt; mso-width-source: userset; mso-width-alt: 5376" width=147><COL style="WIDTH: 95pt; mso-width-source: userset; mso-width-alt: 4608" width=126><TBODY><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; WIDTH: 221pt; HEIGHT: 12.75pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl67 height=17 width=295 align=left>04 (post 9/23/03) 05 up ICP ($150)</TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; WIDTH: 12pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl68 width=16></TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; WIDTH: 110pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl66 width=147>4C3Z-9F838-AA</TD><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; WIDTH: 95pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl66 width=126>1845428C92</TD></TR></TBODY></TABLE>

 

For a late-build 2004 F-Series to 2007 model year, the current part number for an ICP sensor is 4C3Z-9F838-A.

 

Thanks Mike

I know I cant keep up with part# changes But at least I can now Fix this number thank you

 

I don't know where that EGR valve went...It disappeared in the middle of the night. I installed a new ICP yesterday so I will keep everyone posted if the issue continues.

Thanks for all the help!

 

keep us posted if that New Icp helps

 

New ICP didn't solve my problem. Truck died while driving. Pulled over and cranked her for 5 seconds...no start.... took some readings.
KOEO
ICV- 0.22
ICP- 0
IPR- 14.4

While cranking
ICV- 0.45
ICP- 221
IPR- 77.6

Kept cranking and she turned over and drove her home. Once in the driveway I stopped and started her half a dozen times and she fired right up no problem.
Took readings while running

Low Idle
ICV- 0.81
ICP- 579
IPR- 22.1
2500 RPM
ICV- 1.49
ICP- 1391
IPR- 33.1

I did Not replace the ICP harness "pigtail" when I replaced the sensor. Trying to save some money...

Question I have is do you think there may be a short in the harness? Ultimately do you think the harness needs replaced?

 

The readings you have, highlighted in bold red point squarely to a high pressure oil system leak. But because of the extremely intermittent nature of the symptom, even air-testing it may prove very difficult to pinpoint the source.

Since this is an '05 model year truck, has the STC fitting ever been replaced? If the answer is no, THAT would be the first place to start. The next few questions will determine if you have a late-build or early-build 2005. Where is the EBP sensor located? On a bracket secured to the thermostat housing identifies it as an early build. Secured to the FICM bracket identifies is as a late build. Does it have a MAF sensor? If yes, it's an early-build. If no, it's a late-build. The reason I ask is because, if you have a late-build 2005, I would also recommend the updated dummy rail plugs as well. The late build engines (the ones that require a 10mm allen key to remove) use the ones that tend to fail the lower d-ring on the dummy rail plugs.