Glow plug replacement
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
Originally Posted by nodakford
http://cgi.ebay.com/ebaymotors/FORD-7-3L-POWER-STROKE-GLOW-PLUG-TEST-HARNESS-9-PIN_W0QQcmdZViewItemQQcategoryZ33693QQihZ019QQitem Z8055905740QQrdZ1QQsspagenameZWD1V
Here is that harness referred to in the Ford manual. When my truck wouldn't start, I found the L/H bank of glow plugs ohmed out between 1.8-2.1 ohms and the R/H ohmed out between .2 and .3 ohms. Changed out the L'H glow plugs and truck started right up. Wonder why Mitchel on Demands states less then 20 is good?
Here is that harness referred to in the Ford manual. When my truck wouldn't start, I found the L/H bank of glow plugs ohmed out between 1.8-2.1 ohms and the R/H ohmed out between .2 and .3 ohms. Changed out the L'H glow plugs and truck started right up. Wonder why Mitchel on Demands states less then 20 is good?
and majority wins so if over 2 ohms send em packin. but certainly before you pull valve covers test them.
Postmaster
Joined: Nov 2003
Posts: 3,595
Likes: 0
From: Utah County, UT
Personally, the reason for glow plugs is HEAT, i.e. wattage. if your getting 20, you are only getting about 3 watts to heat the chamber, say with 1 ohm you are getting 144W to heat the chamber, now say its 10 degrees out, which one do you want in your truck to make it start? (this is all easy math an just example)
I say if one is out, who cares if the truck starts, if it doesn't start, replace them all as price for one glow plug sure beats doing it 8 times over just to save a few dollars. when down the road you know they will need to be done. Personally, if it is over 2 ohms, I say it is on its way out.
I say if one is out, who cares if the truck starts, if it doesn't start, replace them all as price for one glow plug sure beats doing it 8 times over just to save a few dollars. when down the road you know they will need to be done. Personally, if it is over 2 ohms, I say it is on its way out.
Senior User
Joined: Mar 2006
Posts: 253
Likes: 0
From: Northwest OH
So, for a first time glow plug changer, how long should it take me to do the whole set?
For $70, is there any reason not to replace them all? I have not tested them, but I know that I have a few bad.
For $70, is there any reason not to replace them all? I have not tested them, but I know that I have a few bad.
Postmaster
Joined: Nov 2003
Posts: 3,595
Likes: 0
From: Utah County, UT
I would schedule about 4 hours to do the whole thing if you have never done it before. Then again, I seem to have a x3 factor, I think maybe 30 mins, turns into an hour and a half long project, but 4 should be sufficient to replace the GPs. The longest part is taking the parts off the top of the engine and removing the valve covers. Shy of that, if you have the covers off, I'd replace them all, or at least if you replace some in one side, replace all four in that side.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Originally Posted by ex-wolverine
And do you reccomend replaceing the valve cover gaskets also
Tom
Tom
Laughing Gas
Joined: Feb 2006
Posts: 947
Likes: 1
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Elder User
Joined: Jan 2004
Posts: 803
Likes: 0
From: Bobcaygeon Ont.
Deffinently use Ford replacements! Do not use Autolites!! Mine had them and 3 fell apart when i removed them!! As for the vc gaskets i tested mine with a ohm meter and all wires were fine so i reused them. None of my wires were rubbing so all was good!
Junior User
Joined: Aug 2006
Posts: 73
Likes: 0
From: Idaho
Do you mean that you ohm checked the wires???
Originally Posted by lancer
Deffinently use Ford replacements! Do not use Autolites!! Mine had them and 3 fell apart when i removed them!! As for the vc gaskets i tested mine with a ohm meter and all wires were fine so i reused them. None of my wires were rubbing so all was good!
Thanks
Elder User
Joined: Jan 2004
Posts: 803
Likes: 0
From: Bobcaygeon Ont.
Yes you can check the wires for breaks. Put one test lead in the end of the wire that goes on the glow plug and the other were the wire harness plugs in. If there is any bad wires it will show up here. You can wiggle the wires and see if the #s fluctuate. If they do you have a break in the wire.
Thread
Thread Starter
Forum
Replies
Last Post
Hangfire
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
5
Apr 23, 2005 07:08 PM
