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

slight rough idle when hot

Thread Tools
 
Search this Thread
 
Old Jun 22, 2016 | 11:20 AM
  #1  
rjrandy96's Avatar
rjrandy96
Thread Starter
|
Tuned
Joined: Jun 2013
Posts: 253
Likes: 1
slight rough idle when hot

So I have lots of things done to this motor regulated return 60psi meiling lpop stage 1 cam arp headstuds and since I floated a valve I have new valves and new lifters only on #4 &#8 (thinking this may be my problem only have 600 or so miles since the build) but it's definitely not a misfire or a dead cylinder (my #4 had no valves opening so I know what a dead cylinder is) but it does it only when it's hot when it's cold it's perfect and second you touch the gas it goes completly away I do not have any smoke in the stock tune. And it seems to lose a bit of power (nothing overly crazzy still gets up and goes good just a small noticeable difference like going from 20 tune to stock) and not a warm engine but it has to be hot. My other thought is my hpop could be week and in the next few days IL have acess to a scanner but only for half an hr or so. I wanted a list of things to go over and check so I don't waste my one day off a week
Edit h I almost forgot since the lpop had been installed on wot runs the oil pressure gauge drops to zero (the one on the dash not an actual gauge ) for just a split second but I believe it's because I flow too much oil and it's popping the release valve that I believe is in the system but I do not know for sure that's just what iv been told from someone who had that pump on there truck . It's on stock all ad code injectors
 
Reply
Old Jun 22, 2016 | 02:34 PM
  #2  
Gatordog's Avatar
Gatordog
Senior User
Joined: Jun 2015
Posts: 284
Likes: 0
Do you have Fordscan? If so run the cylinder contribution test. Also buzz test.

Lots of things could cause your problem.
 
Reply
Old Jun 22, 2016 | 02:44 PM
  #3  
rjrandy96's Avatar
rjrandy96
Thread Starter
|
Tuned
Joined: Jun 2013
Posts: 253
Likes: 1
Do not have a fords can but have acess to a scanner that will work for that. I was planning on doing those two test and to check icp and ipr% other than that I do not know what else to check.
 
Reply
Old Jun 23, 2016 | 07:47 PM
  #4  
rjrandy96's Avatar
rjrandy96
Thread Starter
|
Tuned
Joined: Jun 2013
Posts: 253
Likes: 1
Icp at best was 21xonly 510 at idle at cranking it showed 21xx?)
Ipr was 58 at highest
#8 failed buzz test
And it would not perform a contribution test it would just say about to start test. Didnt do anything for 10 min 3 timea ina row.So injectors is no biggy I was going to get 238/100 to go with my stage 1 cam in couple months. As fair as the high pressure oil I'm very confused on the idle and cranking numbers. And why it wouldn't do the contribution test.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Codeman894
6.0L Power Stroke Diesel
24
Apr 4, 2024 09:52 PM
dieselsubmariner
1994.5 - 1997 7.3L Power Stroke Diesel
29
Nov 29, 2012 07:24 AM
jchosler
1994.5 - 1997 7.3L Power Stroke Diesel
1
Jan 16, 2010 11:48 AM
97PWRSTK
1994.5 - 1997 7.3L Power Stroke Diesel
10
Oct 18, 2008 08:47 PM
stockernavstar
1999 - 2003 7.3L Power Stroke Diesel
16
Jan 28, 2006 07:53 PM




All times are GMT -5. The time now is 11:16 AM.

story-0
10 Ways Ford is LOSING to the Competition

Slideshow: 10 ways Ford is losing to the competition

By Joe Kucinski | 2026-06-15 09:52:01


VIEW MORE
story-1
Top 6 Best Deals Available on New Fords & Lincolns Right Now

Some great targets in today's expensive world.

By Brett Foote | 2026-06-15 09:35:19


VIEW MORE
story-2
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.

By Verdad Gallardo | 2026-06-12 11:01:55


VIEW MORE
story-3
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-4
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-5
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-6
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-7
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-8
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-9
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE