Notices
1999 - 2003 7.3L Power Stroke Diesel  
Sponsored by:
Sponsored by: DP Tuner

Stuttering acceleration

Thread Tools
 
Search this Thread
 
Old Nov 26, 2024 | 10:46 AM
  #1  
Blastzone's Avatar
Blastzone
Thread Starter
|
5th Wheeling
Joined: Oct 2024
Posts: 25
Likes: 2
Stuttering acceleration

So I have done many things to try and fix this problem but I can't seem to figure out what's causing the stuttering.
- new ICP and IPR sensors (motorcraft)
- fresh oil and fuel filter
- sending unit is clean
- good fuel pressure
- new IDM
- used forscan and has no codes and values seem to be right

It only start sputtering only while driving and going above 2000rpm and the engine is warm.
I'm starting to get lost here and am needing help.
 
Reply
Old Nov 26, 2024 | 01:01 PM
  #2  
Kintla's Avatar
Kintla
Tuned
Photogenic
Liked
Loved
Community Favorite
Joined: May 2021
Posts: 363
Likes: 121
From: Montana
Asked about codes and then saw you said no codes.

With no codes and more prominent under load (above 2k) I'd be thinking fuel related.

How do you check fuel pressure?
 
Reply
Old Nov 26, 2024 | 01:06 PM
  #3  
Blastzone's Avatar
Blastzone
Thread Starter
|
5th Wheeling
Joined: Oct 2024
Posts: 25
Likes: 2
I hooked up a fuel pressure gauge to the fuel bowl where the fittings are

Originally Posted by Kintla
Asked about codes and then saw you said no codes.

With no codes and more prominent under load (above 2k) I'd be thinking fuel related.

How do you check fuel pressure?
 
Reply
Old Nov 26, 2024 | 01:07 PM
  #4  
Kintla's Avatar
Kintla
Tuned
Photogenic
Liked
Loved
Community Favorite
Joined: May 2021
Posts: 363
Likes: 121
From: Montana
Originally Posted by Blastzone
I hooked up a fuel pressure gauge to the fuel bowl where the fittings are
Can you check pressure while driving or just at idle?
 
Reply
Old Nov 26, 2024 | 01:10 PM
  #5  
Blastzone's Avatar
Blastzone
Thread Starter
|
5th Wheeling
Joined: Oct 2024
Posts: 25
Likes: 2
Both and got around 60-70 psi

Originally Posted by Kintla
Can you check pressure while driving or just at idle?
 
Reply
Old Nov 26, 2024 | 01:19 PM
  #6  
Beechkid's Avatar
Beechkid
Moderator
20 Year Member
Liked
Loved
Community Favorite
Joined: Aug 2002
Posts: 6,099
Likes: 379
From: Southern California
Club FTE Gold Member
IMHO, bad fuel would be my next issue to check out
 
Reply
Old Nov 26, 2024 | 01:23 PM
  #7  
Blastzone's Avatar
Blastzone
Thread Starter
|
5th Wheeling
Joined: Oct 2024
Posts: 25
Likes: 2
I don’t think that would be it cause we filled up my moms 2500 the same day and it’s running fine

Originally Posted by Beechkid
IMHO, bad fuel would be my next issue to check out
 
Reply
Old Nov 26, 2024 | 01:24 PM
  #8  
Blastzone's Avatar
Blastzone
Thread Starter
|
5th Wheeling
Joined: Oct 2024
Posts: 25
Likes: 2
The last things that come to my mind have been the ICP connector or air in the high pressure lines
 
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 Nov 26, 2024 | 03:40 PM
  #9  
Wes444's Avatar
Wes444
Logistics Pro
5 Year Member
Liked
Loved
Community Favorite
Joined: May 2017
Posts: 4,667
Likes: 1,455
From: Muskogee, Ok
Oil level?
 
Reply
Old Nov 26, 2024 | 03:41 PM
  #10  
Blastzone's Avatar
Blastzone
Thread Starter
|
5th Wheeling
Joined: Oct 2024
Posts: 25
Likes: 2
At the allowed max

Originally Posted by Wes444
Oil level?
 
Reply
Old Nov 26, 2024 | 09:36 PM
  #11  
udsuth78's Avatar
udsuth78
Lead Driver
20 Year Member
Liked
Loved
Community Favorite
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
Aeration,if it's only stuttering while driving I'd guess it fuel aeration, but until verified I wouldn't take oil off the table.
 
Reply
Old Nov 26, 2024 | 09:41 PM
  #12  
z31freakify's Avatar
z31freakify
Hotshot
10 Year Member
Liked
Loved
Community Favorite
Joined: Dec 2012
Posts: 11,267
Likes: 1,649
From: Las Cruces New Mexico
Have you ruled out HPO leaks? Could be a bad Injector O ring causing it
 
Reply
Old Nov 30, 2024 | 04:02 PM
  #13  
Blastzone's Avatar
Blastzone
Thread Starter
|
5th Wheeling
Joined: Oct 2024
Posts: 25
Likes: 2
Originally Posted by z31freakify
Have you ruled out HPO leaks? Could be a bad Injector O ring causing it
Ok
how would I go about finding a hpo leak and my icp is reading 468-492 psi at idle(op temp). At 2000 rpm it’s fluctuating about 300-400 psi
 
Reply
Old Nov 30, 2024 | 04:23 PM
  #14  
udsuth78's Avatar
udsuth78
Lead Driver
20 Year Member
Liked
Loved
Community Favorite
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
What's IPR DC% at idle? Warm engine oil it should be around 8-10. If it's 14+ means you might have a leak. That's just one quick and dirty check. There are more accurate tests if you decide you need to investigate further.
 
Reply
Old Nov 30, 2024 | 04:32 PM
  #15  
Blastzone's Avatar
Blastzone
Thread Starter
|
5th Wheeling
Joined: Oct 2024
Posts: 25
Likes: 2
Originally Posted by udsuth78
What's IPR DC% at idle? Warm engine oil it should be around 8-10. If it's 14+ means you might have a leak. That's just one quick and dirty check. There are more accurate tests if you decide you need to investigate further.
Darn it is. I’m guessing YouTube has some good videos on it
 
Reply



All times are GMT -5. The time now is 08:48 AM.

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