7.3 Electrical problem?
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New User
Joined: Oct 2020
Posts: 19
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Better off just replacing that glow plug relay amyway. Most of us use that big ******* Stancore or Western Plow unit. Fresh GPs too if unknown age and brand. ZD11 Ford only.
Hard starts can be from weak or undersize batteries along with a beat starter. Been there and done that. Clean the battery terminals too, corrosion on lead cannot be seen. Good thread on here for that.
Mechanical fuel sucks. E-fuel it and never look back.
Basically baselining the truck is what you need to focus upon too.
Hard starts can be from weak or undersize batteries along with a beat starter. Been there and done that. Clean the battery terminals too, corrosion on lead cannot be seen. Good thread on here for that.
Mechanical fuel sucks. E-fuel it and never look back.
Basically baselining the truck is what you need to focus upon too.
Lead Driver
Joined: Sep 2002
Posts: 9,574
Likes: 2,038
From: North Texas
Ahhhhhh
More data! Try cleaning the square connector under the hood by brake master cyl. Use Deoxit, best stuff around. Same with PCM and IDM connector.
Worth disconnecting that Edge tuner.
Have you rebuilt the IPR? It has a few orings. Also that harness gets chewed up with Diesel fuel. Check my thread, I junked entire fuel filter bowl harness and used a direct shot to the IPR with fresh pigtail and Weatherpack connector. No IPR = No start. I bet if unplugged while running truck would die too as it modulates HPOP.
More data! Try cleaning the square connector under the hood by brake master cyl. Use Deoxit, best stuff around. Same with PCM and IDM connector.
Worth disconnecting that Edge tuner.
Have you rebuilt the IPR? It has a few orings. Also that harness gets chewed up with Diesel fuel. Check my thread, I junked entire fuel filter bowl harness and used a direct shot to the IPR with fresh pigtail and Weatherpack connector. No IPR = No start. I bet if unplugged while running truck would die too as it modulates HPOP.
Thread Starter
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New User
Joined: Oct 2020
Posts: 19
Likes: 0
Ahhhhhh
More data! Try cleaning the square connector under the hood by brake master cyl. Use Deoxit, best stuff around. Same with PCM and IDM connector.
Worth disconnecting that Edge tuner.
Have you rebuilt the IPR? It has a few orings. Also that harness gets chewed up with Diesel fuel. Check my thread, I junked entire fuel filter bowl harness and used a direct shot to the IPR with fresh pigtail and Weatherpack connector. No IPR = No start. I bet if unplugged while running truck would die too as it modulates HPOP.
More data! Try cleaning the square connector under the hood by brake master cyl. Use Deoxit, best stuff around. Same with PCM and IDM connector.
Worth disconnecting that Edge tuner.
Have you rebuilt the IPR? It has a few orings. Also that harness gets chewed up with Diesel fuel. Check my thread, I junked entire fuel filter bowl harness and used a direct shot to the IPR with fresh pigtail and Weatherpack connector. No IPR = No start. I bet if unplugged while running truck would die too as it modulates HPOP.
Freshman User
Joined: Sep 2010
Posts: 44
Likes: 2
Also is it still correct that you always have smoke while cranking?
There is a really good flow chart around for no start on these motors if I have time later I'll post it.
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New User
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You should be seeing 40ish psi while cranking. Check the condition of the spring and plunger in the for (brass plug on the front driver's side of the fuel bowl)
Also is it still correct that you always have smoke while cranking?
There is a really good flow chart around for no start on these motors if I have time later I'll post it.
Also is it still correct that you always have smoke while cranking?
There is a really good flow chart around for no start on these motors if I have time later I'll post it.
Fleet Owner
Joined: Aug 2004
Posts: 20,422
Likes: 197
From: AZ
Freshman User
Joined: Sep 2010
Posts: 44
Likes: 2
Thread Starter
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New User
Joined: Oct 2020
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Thanks for posting the chart. Looks like theres some good info on it. I'll start going through it.
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Sorry for lack of posting but it's been pouring rain here so never got a chance to work on the truck Until yesterday. But I think I finally got to the bottom of this problem. It turns out it was a mix of cps and glow plug relay. The plastic on the gpr post had fallen apart making the post lose. It still looked fine and would test ok because when I put the lead of the multi meter on it would push the post down and create a connection. I found this out after checking for lose connection's by pulling on different wires and the post just pulled right out of the relay. Truck is running good now and starting all the time. Now I just got to figure out why I'm getting a flashing over drive light over 70 kph (40mph)...
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