6.0 Strarting issue when engine hot
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4th Gear
Joined: Feb 2024
Posts: 4
Likes: 1
From: Hawaii
6.0 Strarting issue when engine hot
I am the owner of a 2007 F-250 and recently I've been having issues when starting my truck once the engine is warmed up, I have a scanner, so I went ahead and looked at the codes and I got, multiple codes for low circuit injector number 1 through 8.
I looked at the FICM voltage and it's going anywhere from 46v-48v mostly staying on 48v. I looked through the forums and found someone having a similar issue with the starting, he ended up replacing the IPR valve and I believe it solved his problems. With the FICM having that low of voltage I figure it needs to be replaced anyway and called Eds FICM repair for a price however I'm not sure if I should go ahead and pull the trigger on a new IPR valve. Any help will be appreciated!
I also tested the batteries and alternator to see what caused the FICM to fail or drop voltage in the first place. Everything checked out fine I plan on buying an upgraded alternator as well even though the voltage was fine.
I looked at the FICM voltage and it's going anywhere from 46v-48v mostly staying on 48v. I looked through the forums and found someone having a similar issue with the starting, he ended up replacing the IPR valve and I believe it solved his problems. With the FICM having that low of voltage I figure it needs to be replaced anyway and called Eds FICM repair for a price however I'm not sure if I should go ahead and pull the trigger on a new IPR valve. Any help will be appreciated!
I also tested the batteries and alternator to see what caused the FICM to fail or drop voltage in the first place. Everything checked out fine I plan on buying an upgraded alternator as well even though the voltage was fine.
Last edited by BigBlue6.slow; Feb 26, 2024 at 12:05 AM. Reason: Failed to include all information.
Cargo Master
Joined: Dec 2021
Posts: 2,370
Likes: 992
From: Chambersburg, PA
An IPR might fix the issue, but then again might not. Without a scan tool like FORscan to watch live data you’re kind of just shooting in the dark. Your FICM voltage appears to be in spec BTW, below 45v would be concerning. Hot no start sounds like a high pressure oil leak….
You’ll also get more help over in the 6.0 section of the forum. I suggest you get FORscan and post over there for more help. Good luck.
You’ll also get more help over in the 6.0 section of the forum. I suggest you get FORscan and post over there for more help. Good luck.
Fleet Mechanic
Joined: Sep 2006
Posts: 1,491
Likes: 295
From: Fresno, CA
Very thorough No start writeup by Bismic (from the Tech Folder at the top of the forum):
https://www.ford-trucks.com/forums/8...condition.html
Hot no starts are usually a leak in the high pressure oil system. Watch IPR and ICP during cranking, you'll typically see IPR go full closed (85%) and the ICP not build above 500psi. Truck won't start until the ICP is over 500psi. Check the ICP volts as well as the PCM can infer the ICP if the sensor is wonky.
https://www.ford-trucks.com/forums/8...condition.html
Hot no starts are usually a leak in the high pressure oil system. Watch IPR and ICP during cranking, you'll typically see IPR go full closed (85%) and the ICP not build above 500psi. Truck won't start until the ICP is over 500psi. Check the ICP volts as well as the PCM can infer the ICP if the sensor is wonky.
Thread Starter
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4th Gear
Joined: Feb 2024
Posts: 4
Likes: 1
From: Hawaii
As soon as I get out of work ill try and run the live numbers on it I appreciate the help and will post the results as soon as
I can.
@FiveOJester
I can.
@FiveOJester
Last edited by BigBlue6.slow; Feb 26, 2024 at 04:01 PM.
Thread Starter
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4th Gear
Joined: Feb 2024
Posts: 4
Likes: 1
From: Hawaii
Appreciate it as my first post I'm still learning how the forum works!
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4th Gear
Joined: Feb 2024
Posts: 4
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From: Hawaii
Could not test the IPR today but did test the ICP and its only getting up to 380psi with the oil temp at 175F, with that knowledge im going to order the IPR socket along with getting the FORscan
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