GPR posts
Lead Driver
Joined: Oct 2003
Posts: 8,476
Likes: 37
From: Madison, WI
If it takes the WTS count plus 20 (so aprx. 30 seconds) of GP time at 40F, something's not right. Not all GPs are glowing, or weak relay (just because it closes doesn't mean it's good), or something. It's been 40-ish F in the mornings here, and the WTS time is usu. 10 seconds, and both ours light up just fine on that.
Hotshot
Joined: Mar 2012
Posts: 10,590
Likes: 382
From: Texas
Nate, as always, gracias! I think I mentioned my GPR is out. I jumped it with a screwdriver yesterday just to see what kind of start up I would get and it fired right up. I also meter tested it and got 12v to one post and ZERO to the other. yep, she's dead. I just figured I would OHM the GPs anyways since it seems easy enough.
Post Fiend
Joined: Dec 2010
Posts: 10,121
Likes: 3
From: Orrville, Ohio
Just be careful bending the tab up on the valve cover harness to unplug them. They get brittle from the oil and heat and it's really easy to break the latch tab off. Let's just say I've never broken one unless I was trying to unhook one of them, lol. I generally use a small screwdriver and try to bend the tab just enough to release them. Even then sometimes that is too far.
Fleet Owner
Joined: Aug 2004
Posts: 20,419
Likes: 197
From: AZ
Just be careful bending the tab up on the valve cover harness to unplug them. They get brittle from the oil and heat and it's really easy to break the latch tab off. Let's just say I've never broken one unless I was trying to unhook one of them, lol. I generally use a small screwdriver and try to bend the tab just enough to release them. Even then sometimes that is too far.
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Junior User
Joined: Mar 2009
Posts: 66
Likes: 0
okay, I tested all of the glow plugs through the harness. I got OL on all but one,which read 114.00. I think OL means out of range or something. Does this prove I need GP's. Not all that excited about doing them since I will not be getting stage 1 injectors now.
Lead Driver
Joined: Oct 2003
Posts: 8,476
Likes: 37
From: Madison, WI
Did you test the meter by touching the probes together, to make sure it would show zero (or close to zero) ohms?
If those are for real, then either the glow plugs are bad, or you have wiring problems under the covers.
If those are for real, then either the glow plugs are bad, or you have wiring problems under the covers.
Lead Driver
Joined: Oct 2003
Posts: 8,476
Likes: 37
From: Madison, WI
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Junior User
Joined: Mar 2009
Posts: 66
Likes: 0
I first used the battery negative. Then used a good metal ground on the truck. Both read the same. I also used two multimeters to rule out the possibility of one being bad. Truck didn't want to start this morning. Although, I think my php hydrachip might be part of the problem.
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