Notices
1994.5 - 1997 7.3L Power Stroke Diesel  

No start after Mods

Thread Tools
 
Search this Thread
 
Old Sep 27, 2015 | 07:46 PM
  #1  
Stix117's Avatar
Stix117
Thread Starter
|
New User
Joined: Sep 2015
Posts: 5
Likes: 0
No start after Mods

Hi all, I recently finished my project truck; however, I am having some issues getting it to stay running. It has a hard time starting and when it does start The truck will fire and die unless I keep my foot into it at about 1500 rpms and then it will run for 60 seconds or so. After it dies it wont start unless it sits for a minute or two and i cycle the key. Here's what's been done. Rosewood diesel 160/80 injectors, adrenaline hpop, t4 mount with s366 turbo and intercooler, Hydrachip with tony wildman tunes. And irate diesel full electric fuel system . The tach moves while cranking and I have smoke coming from the exhaust. Fuel pressure at the regulator is at 65psi while cranking. hpo res is full Icp is 53% while cranking and injection pressure is 3445psi.
 
Reply
Old Sep 27, 2015 | 07:53 PM
  #2  
Action4478's Avatar
Action4478
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
IPR DC at 53 % ? May just have air in the system yet. The 53 % is what is called for .
 
Reply
Old Sep 27, 2015 | 08:04 PM
  #3  
Stix117's Avatar
Stix117
Thread Starter
|
New User
Joined: Sep 2015
Posts: 5
Likes: 0
Been cranking for hours now. charged the batteries twice and keep the chargers on during cranking. I'm having a hard time trying to believe there is still air in the system. what should I see ICP at? I thought that 3400psi seemed high?
 
Reply
Old Sep 27, 2015 | 08:14 PM
  #4  
oldbird1965's Avatar
oldbird1965
Fleet Owner
20 Year Member
Liked
Loved
Community Favorite
Joined: Aug 2004
Posts: 20,418
Likes: 197
From: AZ
Club FTE Silver Member

I agree, 3400psi seems wrong?
 
Reply
Old Sep 27, 2015 | 08:38 PM
  #5  
Action4478's Avatar
Action4478
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
3400 is a lie . You will never see that cranking . The ICP sensor is biased . Try unplugging it .The fuel system has air , so does the oil . When it runs let it idle till you can give it fuel
 
Reply
Old Sep 27, 2015 | 08:53 PM
  #6  
Stix117's Avatar
Stix117
Thread Starter
|
New User
Joined: Sep 2015
Posts: 5
Likes: 0
It is a brand new ford icp but I'll give it a shot unplugging it. Could a stuck IPR cause those numbers?
 
Reply
Old Sep 27, 2015 | 09:42 PM
  #7  
Action4478's Avatar
Action4478
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
The IPR number is what the PCM is calling for . Yes , the IPR could be sticking . THe PCM commands the IPR based on what it sees from the ICP sensor mainly. It uses TPS input as well . 3400 would be WOT . . You are using the go pedal may be why the ICP is high . We normally start the engine at idle .
 
Reply
Old Sep 27, 2015 | 10:45 PM
  #8  
Stix117's Avatar
Stix117
Thread Starter
|
New User
Joined: Sep 2015
Posts: 5
Likes: 0
Well i just did some more diag, and found the IPR not moving at all. Put 12 volts and no movement or sound coming from the IPR. Will pick up a new ford one tomorrow and let you all know how it goes
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

Top 10 Ford Truck Tragedies

 Joe Kucinski
story-1

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

 Brett Foote
story-2

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

 Michael S. Palmer
story-3

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

 Verdad Gallardo
story-4

10 Best Ford Truck Engines We Miss the Most!

 Joe Kucinski
story-5

2026 Shelby F-150 Off-Road: Better Than a Raptor R?

 Brett Foote
story-6

2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

 Michael S. Palmer
story-7

10 Most Surprising 2026 Ford Truck Features!

 Joe Kucinski
story-8

Top 10 Ford Trucks Coming to Mecum Indy 2026

 Brett Foote
story-9

5 Best / 5 Worst Ford Truck Wheels of All Time

 Joe Kucinski
Old Sep 28, 2015 | 08:27 AM
  #9  
oldbird1965's Avatar
oldbird1965
Fleet Owner
20 Year Member
Liked
Loved
Community Favorite
Joined: Aug 2004
Posts: 20,418
Likes: 197
From: AZ
Club FTE Silver Member

Go to Riffraff to get one, Ford will bend you over for one.
 
Reply
Old Sep 28, 2015 | 09:45 AM
  #10  
Action4478's Avatar
Action4478
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
Originally Posted by Stix117
Well i just did some more diag, and found the IPR not moving at all. Put 12 volts and no movement or sound coming from the IPR. Will pick up a new ford one tomorrow and let you all know how it goes
With the key on there is 12v to the IPR continually . The PCM sends ground to it as needed in a pulse . .
 
Reply
Old Sep 28, 2015 | 10:40 PM
  #11  
Stix117's Avatar
Stix117
Thread Starter
|
New User
Joined: Sep 2015
Posts: 5
Likes: 0
Originally Posted by Action4478
With the key on there is 12v to the IPR continually . The PCM sends ground to it as needed in a pulse . .
Thanks that's good to know for future use. I could not get the IPR coil to do anything on the bench so I picked up a new ford IPR today hooked up my scanner and cranked the truck for maybe 10-15 seconds icp went to 825 and truck fired right up! I let it run for maybe 10-15 minutes before the rain came and had to call it a day. One thing I thought was interesting that the old coil was measuring 10.8 ohms same as the new one but I couldn't get it to energize. Can't wait to wrap up the last few things and drive this truck with the bigger sticks in
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
rickdavis81
1994.5 - 1997 7.3L Power Stroke Diesel
29
Dec 15, 2015 02:08 PM
Country_boy_2007
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
6
Feb 19, 2012 01:20 PM
joe.d
6.0L Power Stroke Diesel
44
Aug 14, 2011 06:56 PM
joe.d
6.0L Power Stroke Diesel
8
Jun 1, 2011 11:28 PM
maxum96
6.0L Power Stroke Diesel
4
Apr 15, 2011 01:13 AM




All times are GMT -5. The time now is 12:37 PM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-1
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-2
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-3
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-4
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-5
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-6
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-7
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-8
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-9
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE