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

not starting in cold

Thread Tools
 
Search this Thread
 
Old Feb 8, 2010 | 01:55 PM
  #1  
Dan Taylor's Avatar
Dan Taylor
Thread Starter
|
Senior User
Joined: Nov 2007
Posts: 138
Likes: 0
not starting in cold

well a few weeks ago my fuel heater went so i just unplugged that and used a block heater every night. i just put in new fuel heater and the #30 30 amp fuse is not blowing and the glow plug light on the dash is turning on so i know the fuse isnt being blown. last night i didnt use the block heater to see if the new fuel heater would work and it seems to not be working. any ideas? its 32 deg. out right now and ive never had this problem when my old heater did work. i have started it with the new heater installed yesterday.
 
Reply
Old Feb 8, 2010 | 02:18 PM
  #2  
spdmpo's Avatar
spdmpo
Postmaster
Joined: Jan 2009
Posts: 2,544
Likes: 4
From: Suffolk, VA
That fuel bowl heater won't have any effect on starting. Sounds like you need to check the glow plug relay and ohm out the glow plugs. That's where I'd start.
 
Reply
Old Feb 8, 2010 | 02:21 PM
  #3  
tdpower's Avatar
tdpower
Postmaster
Joined: Dec 2008
Posts: 3,340
Likes: 2
Your fuel heater does not help on a cold start. I would test your glow plug relay. One big post on it should have around 12 volts all the time and the other big post should have voltage when you turn the key. The gpr will stay on up to two minutes. If that checks out then test your glow plugs. Make sure your batteries and connections are all good as well.
 
Reply
Old Feb 8, 2010 | 07:52 PM
  #4  
F350-6's Avatar
F350-6
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
^^^^ What they said. Plugging the truck in has absolutely nothing to do with the fuel bowl heater. Plugging it in warms the engine coolant. The fuel bowl heater warms a few ounces of fuel out of the 30 or so gallons of diesel you have in your truck. Check the GPR.
 
Reply
Old Feb 8, 2010 | 10:03 PM
  #5  
Dan Taylor's Avatar
Dan Taylor
Thread Starter
|
Senior User
Joined: Nov 2007
Posts: 138
Likes: 0
thanks for the input i put a new relay in today the napa gpr 109 cost me $33 and ill see how it works tom.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
f100today
1994.5 - 1997 7.3L Power Stroke Diesel
13
Dec 9, 2016 08:49 PM
dieselsmoker
6.4L Power Stroke Diesel
8
Dec 29, 2012 03:50 PM
yachtonwheels
1999 - 2003 7.3L Power Stroke Diesel
31
Jan 22, 2011 01:45 PM
Blue Collar
1994.5 - 1997 7.3L Power Stroke Diesel
14
Nov 5, 2008 02:41 AM
sommerfliesby
1999 - 2016 Super Duty
9
Jan 27, 2007 08:03 PM




All times are GMT -5. The time now is 04:06 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

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


VIEW MORE
story-7
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-8
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-9
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