Notices
1994.5 - 1997 7.3L Power Stroke Diesel  

electronics/trans issues, voltage jumps

Thread Tools
 
Search this Thread
 
Old Dec 30, 2008 | 03:19 PM
  #1  
maverick1701's Avatar
maverick1701
Thread Starter
|
Posting Guru
Joined: Feb 2008
Posts: 1,795
Likes: 1
From: Lubbock, Texas
electronics/trans issues, voltage jumps

so I did some searching and came up empty....hopefully yall can help me out

Here is what is going on...

Whenever I shift from any drive gear (D, 1, 2, r) into neutral my rpms drop for a few secs but here is the new issue....
When my rpms reach around 2700-2800 my battery light comes on and and then the voltage meter jumps up way way high. Once the trans shifts everything goes back to normal....any ideas? I have no clue

Maybe a short in the mechanism that shifts the trans?
 
Reply
Old Dec 30, 2008 | 04:56 PM
  #2  
tjbeggs's Avatar
tjbeggs
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
Club FTE Silver Member

Rev it that high in neutral and see what it does. I would be looking at the Voltage regulator for the issue.
 
Reply
Old Dec 30, 2008 | 05:00 PM
  #3  
powerstroked162's Avatar
powerstroked162
Postmaster
Joined: Apr 2004
Posts: 3,658
Likes: 0
From: Ellensburg, Washington
^^^x2^^^

Dosn't sound like trans related from what your describing, leaning on charging and regulator system

Cowboy Steve
 
Reply
Old Dec 30, 2008 | 05:43 PM
  #4  
maverick1701's Avatar
maverick1701
Thread Starter
|
Posting Guru
Joined: Feb 2008
Posts: 1,795
Likes: 1
From: Lubbock, Texas
when revving the truck in neutral everything acts correctly....no battery light and no voltage jump
 
Reply
Old Dec 30, 2008 | 05:50 PM
  #5  
powerstroked162's Avatar
powerstroked162
Postmaster
Joined: Apr 2004
Posts: 3,658
Likes: 0
From: Ellensburg, Washington
Does it happen before the trans shifts into every gear?

Cowboy Steve
 
Reply
Old Dec 30, 2008 | 06:26 PM
  #6  
maverick1701's Avatar
maverick1701
Thread Starter
|
Posting Guru
Joined: Feb 2008
Posts: 1,795
Likes: 1
From: Lubbock, Texas
Originally Posted by powerstroked162
Does it happen before the trans shifts into every gear?

Cowboy Steve

well i dont ever end up with 2800rpms when I am in 3rd and 4th gear (I will see what i can do) but I know for sure that it does the light/voltage drop while in 1st and I will try it in 2nd when I run to sams tonight
 
Reply
Old Dec 30, 2008 | 06:45 PM
  #7  
powerstroked162's Avatar
powerstroked162
Postmaster
Joined: Apr 2004
Posts: 3,658
Likes: 0
From: Ellensburg, Washington
Yep, check that and see if starting in 2nd and shifting to drive will cause a spike. Do you have any diffrence in your shifts? later, sooner, firmer, softer, slipping, etc.,?

Cowboy Steve
 
Reply
Old Dec 31, 2008 | 10:40 PM
  #8  
maverick1701's Avatar
maverick1701
Thread Starter
|
Posting Guru
Joined: Feb 2008
Posts: 1,795
Likes: 1
From: Lubbock, Texas
so now its no longer doing it (the voltage jumps while changing gears at high rpms)

but instead it feels like it is holding onto 1st gear for a really long time and then jumping right into 3rd
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

Top 10 Fords at 2026 Carlisle Ford Nationals

 Joe Kucinski
story-1

3 Best / 3 Worst Parts of Modern Ford Ownership

 Brett Foote
story-2

10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

 Pouria Savadkouei
story-3

Every 2026 Ford Engine Explained

 Brett Foote
story-4

10 Ugly Ford Trucks That We Still Kinda Love

 Joe Kucinski
story-5

10 Things Every Truck Owner NEEDS (2026 Edition)

 Michael S. Palmer
story-6

Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

 Verdad Gallardo
story-7

Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

 Joe Kucinski
story-8

2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

 Brett Foote
story-9

Top 10 Ford Truck Tragedies

 Joe Kucinski
Old Dec 31, 2008 | 11:41 PM
  #9  
powerstroked162's Avatar
powerstroked162
Postmaster
Joined: Apr 2004
Posts: 3,658
Likes: 0
From: Ellensburg, Washington
Do you have any CEL when this happens?

Cowboy Steve
 
Reply
Old Jan 1, 2009 | 01:25 AM
  #10  
maverick1701's Avatar
maverick1701
Thread Starter
|
Posting Guru
Joined: Feb 2008
Posts: 1,795
Likes: 1
From: Lubbock, Texas
Originally Posted by powerstroked162
Do you have any CEL when this happens?

Cowboy Steve
the only idiot light I had flash was the battery light when I was having the voltage jumps. Now I have no volrtage jumps and no warning lights...just the strange shifting
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
venny
1994.5 - 1997 7.3L Power Stroke Diesel
26
Jan 26, 2015 10:20 AM
98bigx
1999 - 2016 Super Duty
2
Nov 18, 2013 09:11 PM
brnab1
1999 - 2003 7.3L Power Stroke Diesel
2
Aug 24, 2010 07:49 PM




All times are GMT -5. The time now is 01:25 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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
story-7
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-8
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE
story-9
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

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


VIEW MORE