Best GPR?
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Fleet Mechanic
Joined: Jul 2005
Posts: 1,800
Likes: 52
From: Southern Colorado
Best GPR?
The best no-start is in your driveway. I shorted the GPR terminals with Vise grips and it fired right up and the voltmeter showed a big drop, as it should.
On Rock Auto, I see $30 junkers, $58 Motorcraft, and the web told me to get a White Rogers 586-902 - $80 on (boycott) Amazon.
What do the sages of FTE say?
Steve
On Rock Auto, I see $30 junkers, $58 Motorcraft, and the web told me to get a White Rogers 586-902 - $80 on (boycott) Amazon.
What do the sages of FTE say?
Steve
FTE Chapter Leader
Joined: Jan 2005
Posts: 13,124
Likes: 4,725
From: Henderson, NV
The Stancor/White-Rodgers is the old classic is what I have had since 2014 and has been great. Trombetta is the new kid on the block that has a friendlier (in terms of mounting) form factor.
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Fleet Mechanic
Joined: Jul 2005
Posts: 1,800
Likes: 52
From: Southern Colorado
Found it - the definitive Trombetta link - https://www.ford-trucks.com/forums/1...y-install.html
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,354
Likes: 5,946
From: Lake Hartwell, GA
You have already identified the proper Trombetta GPR, but I will provide a bit more information for you to make an even more informed decision.
The Motorcraft GPR is a well functioning and reliable GPR, nothing wrong with it at all.
The Stancor/White Rogers is more heavy duty, but also requires to be "squeezed" in or relocated in order to fit properly. I believe I have only seen one install where the posts were in the vertical position where the others are with the posts in the horizontal position due to the overall size of the Stancor/White Rogers GPR. Nothing wrong with it at all.
The Trombetta came onto the scene recently thanks to Chris (KubotaOrange76). I recently had a strange GPR scenario present itself and I isolated the issue to the PCM doing what it is designed to do during a cold start situation. I replaced the 20 year old Motorcraft GPR with the Trombetta 684-1241-212 and have been very pleased with it. Nothing wrong with it at all.
Some Motorcraft to Trombetta comparison pictures are in the following link: https://www.ford-trucks.com/forums/1...l#post19725837
Basically, you will be happy with any of the three choices above, just don't stray off that path.
The Motorcraft GPR is a well functioning and reliable GPR, nothing wrong with it at all.
The Stancor/White Rogers is more heavy duty, but also requires to be "squeezed" in or relocated in order to fit properly. I believe I have only seen one install where the posts were in the vertical position where the others are with the posts in the horizontal position due to the overall size of the Stancor/White Rogers GPR. Nothing wrong with it at all.
The Trombetta came onto the scene recently thanks to Chris (KubotaOrange76). I recently had a strange GPR scenario present itself and I isolated the issue to the PCM doing what it is designed to do during a cold start situation. I replaced the 20 year old Motorcraft GPR with the Trombetta 684-1241-212 and have been very pleased with it. Nothing wrong with it at all.
Some Motorcraft to Trombetta comparison pictures are in the following link: https://www.ford-trucks.com/forums/1...l#post19725837
Basically, you will be happy with any of the three choices above, just don't stray off that path.
Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
Wiring the Stancor (White Rogers) to the fender is a little tedious, but I'm very glad I did it for the benefit gained by opening up the valley. I also get a solid tactile feedback when the relay clicks off, so I don't need to install the older LED mod. I've had the relay on my fender for nearly 7 years now without a single glitch. I would happily do the same with the new kid on the block as well (Trombettta) for the same reason - open valley!
Laughing Gas
Joined: Mar 2021
Posts: 1,118
Likes: 425
What sort of wire gauge did you use for this? You check resistance before and after to see if it was comparable to the stock setup?
Lead Driver
Joined: Jul 2017
Posts: 6,861
Likes: 2,335
From: WV
I don’t know the best but can tell you from experience to stay away from the parts store flavors. I’m going Trombetta or Motorcraft if(when) replacing again. May have to order one to have on hand or change out before failure so the lead time doesn’t cause me to do the unthinkable again.
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Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
Don't recall the chosen wire gauge, but I can check. My tendency is to always "upsize".
Did not check resistance.
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Joined: Aug 2003
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From: Eastern Washington
I actually also have another one on the shelf in case someone else needs one or I wind up with an extra 7.3....
Postmaster
Joined: Nov 2015
Posts: 4,807
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From: Colorado Springs
‘I’ve been running the Stancor since 2015, it has been great. Absolutely no problem installing it either.
More Turbo
Joined: Oct 2009
Posts: 655
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From: Randolph County NC
I am adding this to the thread to maybe assist others in troubleshooting GPR problems.
I converted to the White Rodgers relay several years ago and until recently it worked perfectly. I have the GPR indicator light installed and I noticed that some times the light would not come on. If I cycled the key switch a couple of times the light would come on. I assumed the relay was starting to fail and ordered another relay. I installed the replacement relay and noticed light corrosion (white powdery stuff) on some of the small wire control wiring connections attached to the relay. I think this corrosion was the problem all along. I cleaned all corrosion installed new relay and added a light coating of dielectric grease to all relay terminals and fasteners. I now have a used but good spare relay to add to my used but good parts collection.
I converted to the White Rodgers relay several years ago and until recently it worked perfectly. I have the GPR indicator light installed and I noticed that some times the light would not come on. If I cycled the key switch a couple of times the light would come on. I assumed the relay was starting to fail and ordered another relay. I installed the replacement relay and noticed light corrosion (white powdery stuff) on some of the small wire control wiring connections attached to the relay. I think this corrosion was the problem all along. I cleaned all corrosion installed new relay and added a light coating of dielectric grease to all relay terminals and fasteners. I now have a used but good spare relay to add to my used but good parts collection.
Cargo Master
Joined: Jul 2011
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From: Walpole, MA
FTE Leadership Emeritus
Joined: May 2014
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From: Lake Hartwell, GA
