What could be wrong??
Thread Starter
|
Senior User
Joined: Aug 2008
Posts: 147
Likes: 0
What could be wrong??
'01 FSD w/ 7.3L. . . 95,000 . . . just changed oil and air filter . . . just made a 1000 mile round trip with no problems. Have had the truck for several years.
Got back yesterday (Friday) afternoon from said trip, it sat in the driveway overnight, and this morning it would not fire.
Turning over just fine (until i RAN THE BATTERIES DOWN), but no fire.
It's a little chilly here today so I cycled it a few times . . . still not firing.
Then I gave it a little "gas" while cranking (this sometimes gets it to fire when it's really cold), but nothing!!
Diagnostics is damn hard I know . . . but maybe one of you have a spark of an idea what might be wrong?!
Got back yesterday (Friday) afternoon from said trip, it sat in the driveway overnight, and this morning it would not fire.
Turning over just fine (until i RAN THE BATTERIES DOWN), but no fire.
It's a little chilly here today so I cycled it a few times . . . still not firing.
Then I gave it a little "gas" while cranking (this sometimes gets it to fire when it's really cold), but nothing!!
Diagnostics is damn hard I know . . . but maybe one of you have a spark of an idea what might be wrong?!
Postmaster
Joined: Oct 2004
Posts: 3,767
Likes: 1
'01 FSD w/ 7.3L. . . 95,000 . . . just changed oil and air filter . . . just made a 1000 mile round trip with no problems. Have had the truck for several years.
Got back yesterday (Friday) afternoon from said trip, it sat in the driveway overnight, and this morning it would not fire.
Turning over just fine (until i RAN THE BATTERIES DOWN), but no fire.
It's a little chilly here today so I cycled it a few times . . . still not firing.
Then I gave it a little "gas" while cranking (this sometimes gets it to fire when it's really cold), but nothing!!
Diagnostics is damn hard I know . . . but maybe one of you have a spark of an idea what might be wrong?!
Got back yesterday (Friday) afternoon from said trip, it sat in the driveway overnight, and this morning it would not fire.
Turning over just fine (until i RAN THE BATTERIES DOWN), but no fire.
It's a little chilly here today so I cycled it a few times . . . still not firing.
Then I gave it a little "gas" while cranking (this sometimes gets it to fire when it's really cold), but nothing!!
Diagnostics is damn hard I know . . . but maybe one of you have a spark of an idea what might be wrong?!
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
'01 FSD w/ 7.3L. . . 95,000 . . . just changed oil and air filter . . . just made a 1000 mile round trip with no problems. Have had the truck for several years.
Got back yesterday (Friday) afternoon from said trip, it sat in the driveway overnight, and this morning it would not fire.
Turning over just fine (until i RAN THE BATTERIES DOWN), but no fire.
It's a little chilly here today so I cycled it a few times . . . still not firing.
Then I gave it a little "gas" while cranking (this sometimes gets it to fire when it's really cold), but nothing!!
Diagnostics is damn hard I know . . . but maybe one of you have a spark of an idea what might be wrong?!
Got back yesterday (Friday) afternoon from said trip, it sat in the driveway overnight, and this morning it would not fire.
Turning over just fine (until i RAN THE BATTERIES DOWN), but no fire.
It's a little chilly here today so I cycled it a few times . . . still not firing.
Then I gave it a little "gas" while cranking (this sometimes gets it to fire when it's really cold), but nothing!!
Diagnostics is damn hard I know . . . but maybe one of you have a spark of an idea what might be wrong?!
Where are you located?
My first thought is your glow plug relay has failed.
Posting Guru
Joined: Nov 2003
Posts: 1,949
Likes: 0
From: Near DC
Trending Topics
Logistics Pro
Joined: Jun 2005
Posts: 4,243
Likes: 16
From: AZ
And charge those batteries up slowly overnight.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Logistics Pro
Joined: Jun 2005
Posts: 4,243
Likes: 16
From: AZ
I'm betting one of two things: batteries or glow plug relay. So the batteries, unless they are old, will benefit from a nice low amp charge overnight. Then turn the key to the RUN position, go under the hood and you will see a relay on the passenger side of the engine (to the left of, and slightly behind, the fuel filter). If you have a test lamp or a multimeter, touch each of the large posts and you should see 12+ volts on both posts. If you don't have a test light or multimeter, just take a screwdriver and jump the two large posts for about 30 seconds or so (you will hear/see a little spark when you jump the posts with the screwdriver). Then try to start the truck.
Logistics Pro
Joined: Jun 2005
Posts: 4,243
Likes: 16
From: AZ
We've seen them go bad quickly and some last years and years. If you need a quick, cheap one NAPA has the GPR-109 for cheap ($29?). If you tell them it is for a Ford 7.3 they'll give you the GPR-110 for mucho $$$ ($100?). They are identical relays, just twisted 90 degrees. It will work on your truck...guaranteed.
Posting Guru
Joined: Nov 2003
Posts: 1,949
Likes: 0
From: Near DC
I replaced mine in my '03 with a Stancor, simply because I knew it would eventually fail.
It was a straight-forward swap.
Here is the link:
Welcome to guzzle's Stancor GPR replacement Mod Web Page
Bookmark the index of this site and go through it, fantastic info you WILL need. He is one of our members.
It was a straight-forward swap.
Here is the link:
Welcome to guzzle's Stancor GPR replacement Mod Web Page
Bookmark the index of this site and go through it, fantastic info you WILL need. He is one of our members.