Won't Start
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5th Gear
Joined: Nov 2022
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Won't Start
Hey all, sorry if this has been asked. I searched for my problem but didn't find anything. I have a 2017 F250 Lariat. After it has sat for 2 plus days, it won't start. I thought at first that I had a bad battery. Got the batteries tested and they're good. I can jump start it and it will start up. Once it reaches operating temp, it will start just fine. But if I let it set again, then I have to jump it to start it again. I've done some research and found that the fuse box is notorious for being faulty, but not sure what I would check to determine if that's the issue. Has anyone else had this issue, or possibly know what I could do to figure this out? Thanks for any help you can provide.
Lead Driver
Joined: Nov 2005
Posts: 8,477
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Hey all, sorry if this has been asked. I searched for my problem but didn't find anything. I have a 2017 F250 Lariat. After it has sat for 2 plus days, it won't start. I thought at first that I had a bad battery. Got the batteries tested and they're good. I can jump start it and it will start up. Once it reaches operating temp, it will start just fine. But if I let it set again, then I have to jump it to start it again. I've done some research and found that the fuse box is notorious for being faulty, but not sure what I would check to determine if that's the issue. Has anyone else had this issue, or possibly know what I could do to figure this out? Thanks for any help you can provide.
Diesel or gas?
And, when you say it won't start after sitting a couple of days, does the engine turn over at all, or does it just click and then do nothing?
And, you say the batteries were tested, but how were they tested?
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Joined: Aug 2008
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From: Frederick, MD
If the batteries were tested in the truck and connected (not islolated from each other and the truck) then that is most likely your issue.
You are not reporting a check engine light or the battery light illuminated so battery time.
Replace both if we are taking diesel
You are not reporting a check engine light or the battery light illuminated so battery time.
Replace both if we are taking diesel
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5th Gear
Joined: Nov 2022
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Sorry, yes it is a diesel. The batteries were in the truck when they were tested. Thanks for the advice.
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5th Gear
Joined: Nov 2022
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When asking for mechanical advice, the details of the truck are needed, as well as the details of the symptoms.
Diesel or gas?
And, when you say it won't start after sitting a couple of days, does the engine turn over at all, or does it just click and then do nothing?
And, you say the batteries were tested, but how were they tested?
Diesel or gas?
And, when you say it won't start after sitting a couple of days, does the engine turn over at all, or does it just click and then do nothing?
And, you say the batteries were tested, but how were they tested?
Cargo Master
Joined: Apr 2018
Posts: 2,413
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2nd, when turning over, is it at a normal pace or slower? I'm assuming slower. I believe the engine needs to turn over in the min of RPM to fire off the injectors.
Need to test the batteries independently. One bad battery will drag down the other.
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Fleet Mechanic
Joined: Mar 2021
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Always replace them in pairs as Senix said, and get a good set of AGMs like Northstar or Odyssey.
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5th Gear
Joined: Nov 2022
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1st, how old are the good batteries?
2nd, when turning over, is it at a normal pace or slower? I'm assuming slower. I believe the engine needs to turn over in the min of RPM to fire off the injectors.
Need to test the batteries independently. One bad battery will drag down the other.
2nd, when turning over, is it at a normal pace or slower? I'm assuming slower. I believe the engine needs to turn over in the min of RPM to fire off the injectors.
Need to test the batteries independently. One bad battery will drag down the other.
Lead Driver
Joined: Nov 2005
Posts: 8,477
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Sounds more like a fuel system issue.