Go Back   PowerStrokeArmy > Power Strokes > 6.4 Tech

Reply
 
Thread Tools Display Modes
  #1  
Old 11-14-2020, 08:58 PM
1jb35 1jb35 is offline
Private
Member's Gallery
 
Join Date: Nov 2020
Posts: 6
Default Weird crank no start issue...

08 6.4, ******d, ARP head studs, H&S mini maxx....here is the issue:

For example: a 12mile trip will result in a crank no start issue with a fuel rail pressure of .3ksi. When it does start the FRP is 4.8 - 5.0 ksi. Shorter trips, 2-3 mi, it will usually start back but not always.

The no start ranges from 15 minutes to 10 hours before it decides to start from my experience. Fuel pump is operating normally and no air in fuel. While driving there is no change in the performance of the truck. Although it does throw 3 codes on a no start but only one at a time and any given day they may differ, P0001, P0090 and P0087.

I have noticed that when the key is turned to the run position I typically hear whatever cycles under the hood and the fuel pump and it starts right up ( i dont know what all cycles when the key is in the run position). I can predict a no start because i only hear the fuel pump with the key in run and sure enough, a no start.

Any suggestions/recommendations would be appreciated. Thanks in advance

Last edited by 1jb35; 11-14-2020 at 08:59 PM. Reason: edited wording
  #2  
Old 11-15-2020, 11:22 AM
TD-5's Avatar
TD-5 TD-5 is offline
Sergeant
Member's Gallery
 
Join Date: Sep 2013
Location: British Columbia Canada
Posts: 270
Default

All those codes point to a problem with the Hi Pressure Fuel Pump, Possibly a problem with the harness.
Attached Images
File Type: jpg HPFP.jpg (361.7 KB, 11 views)
__________________
2010 F350 KR CCLB, mini max, MCC tuned.
  #3  
Old 11-15-2020, 04:28 PM
powerstroked08's Avatar
powerstroked08 powerstroked08 is offline
Colonel
Member's Gallery
 
Join Date: Sep 2012
Location: Pennsylvania
Posts: 3,430
Default

If you hear the pump run but don't hear the vgt actuate. Then there isn't any voltage going to the vcv and pcv on the pump. So they default to full open until they have voltage. So the pump will not build pressure.

Sent from my SM-G950U using Tapatalk
__________________
2008 F-350 cclb ZF-6 speed
Just another white truck
Quote:
Originally Posted by Meniacal_Mark View Post
Time to dynamat the babies room lol
Quote:
Originally Posted by B585Ford View Post
Thats obviously for safety....ya never know when you might be going through an intersection and some idiot runs a light...anything under 1000HP and your toast.
  #4  
Old 11-15-2020, 08:39 PM
webb06's Avatar
webb06 webb06 is offline
Colonel
Member's Gallery
 
Join Date: Aug 2012
Location: Seneca, MO
Posts: 3,786
Default

Quote:
Originally Posted by powerstroked08 View Post
If you hear the pump run but don't hear the vgt actuate. Then there isn't any voltage going to the vcv and pcv on the pump. So they default to full open until they have voltage. So the pump will not build pressure.

Sent from my SM-G950U using Tapatalk

Good call. Without looking at a wiring diagram Iíd think the only connector those all share would be at the pcm. Maybe a short in the engine harness itself.


Sent from my iPhone using Tapatalk
  #5  
Old 11-16-2020, 11:26 AM
1jb35 1jb35 is offline
Private
Member's Gallery
 
Join Date: Nov 2020
Posts: 6
Default

Thanks. I will check this out
  #6  
Old 11-16-2020, 05:29 PM
1jb35 1jb35 is offline
Private
Member's Gallery
 
Join Date: Nov 2020
Posts: 6
Default

I forgot to mention that as along as the truck is running it is fine. So, if the wiring harness or HPFP is an issue would this cause the truck to stall or quit while driving. As long as you donít shut the truck off it is fine.
  #7  
Old 11-16-2020, 06:18 PM
ghohouston's Avatar
ghohouston ghohouston is offline
Colonel
Member's Gallery
 
Join Date: Dec 2012
Location: Lewisville,Texas
Posts: 3,894
Default

I wanted to say the injectors are worn, but the no start for 10 hours leads me away from that, and I'd absolutely agree it's either a wiring short or a sensor acting goofy.
__________________
1997 F350 SRW CCLB 4x4 ZF5 7.3
2018 Ram 5500 Mechanics Truck
2001Tdi Jetta 5 speed
  #8  
Old 11-16-2020, 09:49 PM
webb06's Avatar
webb06 webb06 is offline
Colonel
Member's Gallery
 
Join Date: Aug 2012
Location: Seneca, MO
Posts: 3,786
Default

Quote:
Originally Posted by 1jb35 View Post
I forgot to mention that as along as the truck is running it is fine. So, if the wiring harness or HPFP is an issue would this cause the truck to stall or quit while driving. As long as you donít shut the truck off it is fine.

Whatís the longest youíve ran it? Like hours? So itís never died on you while driving?

If not, has the cab been off recently? Iíve had issues with the 3 bigger connectors under coolant tank that have to be taken apart when cab comes off. Causes similar issues.


Sent from my iPhone using Tapatalk
  #9  
Old 11-17-2020, 07:01 AM
1jb35 1jb35 is offline
Private
Member's Gallery
 
Join Date: Nov 2020
Posts: 6
Default

Ive ran it for a few hours at a time, some idle if went in a store. Never died, or gave any indication it wanted to while driving. No wrench light on dash ever. Only get codes on mini max.

Yes, cab has been off twice for headstuds and up pipe
  #10  
Old 11-18-2020, 09:41 PM
webb06's Avatar
webb06 webb06 is offline
Colonel
Member's Gallery
 
Join Date: Aug 2012
Location: Seneca, MO
Posts: 3,786
Default

How long since cab off?


Sent from my iPhone using Tapatalk
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 08:22 AM.

 

Powered by vBulletin®
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

Designed by Military Ltd