Truck sat for 16 days and now problems

[Fatal129]

So before I left for 16 days my fuel guage was acting up randomly reading different. Then I came back and wouldn't start I charged the battery and it started. Batteries tested fine and it's a fairly new alternator. It sat a night and then wouldn't start. Two weeks later jumping it or play roulette to see if it would start my batteries are bad now. I am getting two new batteries and alternator tomorrow but I'm worried my fuel control model is shot....or does anyone else think it could be something else with my fuel guage? I'm worried if it is the FCIM it will murder my new batteries..,


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[Snake]

Fuel level gauge is independent of your HFCM and FICM. If you're having a problem with it, the other two components shouldn't be affected. Make sure you get your new batteries load tested and your alternator tested before or right after the install. I bought a new alternator last week and it was bad right out of the box.

[06SuperDutyF250]

if it sat for 2 weeks, maybe it got a little stiff?, How much fuel is in the tank? I would Fill it up Fully and see what happens. as far as the batteries and ficm...Snake already said it. after installation i would have the ficm v tested as well.

[Fatal129]

Yes I already planned on going to test the FCIM once new batteries are in. I was also thinking it could be the sender unit all clogged or messed up


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[nylyon]

I had a no-start condition last year. If I wiggled (squished the wires inside the heat shields around) for the ICP sensor, the truck would start. I squished them around quite a bit and problem went away. I have since replaced the ICP pigtail and haven't had a no-start since. Something to try anyway.

[dannyboy950]

Tank float switches are bad for sticking and corrosion build up interrupting current flow. No biggie I am more worried about the no start condition. I suggest reading the sticky on the 6.0ltr forum first post.

Asimple quick test is disconnect the icp and try to start the engine, if it starts and stays running, you have a bad ICP or pig tail. The disconnecting of the icp causes the PCM to use a default set of values to start the tuck on. Basically it lies to itself that you have over 500 psi High pressure oil and its ok to fire the injectors.

If the rest of the HP oil system is good the truck will stay running. If not further testing is required.

[nylyon]

Originally Posted by dannyboy950

A simple quick test is disconnect the icp and try to start the engine, if it starts and stays running, you have a bad ICP or pig tail.

Not sure these words belong in the same sentence, "quick", "simple", "ICP" and "2003" unless the word "not" is in there somewhere

I wonder if when I had my issue if unhooking the ICP would have done anything. My wiring pigtail was the culprit for the no-start. Can't hurt to do both, but I know in my case, getting to the ICP connector is a pain in the neck!

[dannyboy950]

Ahhhh but then I am a bit of a saddist, every one should exsperience the joy of the 03 ICP and IPR issues and testing if only once in life. (Lage box of bandaids highly recomended)

[Deer Creek]

Originally Posted by dannyboy950

Ahhhh but then I am a bit of a saddist, every one should exsperience the joy of the 03 ICP and IPR issues and testing if only once in life. (Lage box of bandaids highly recomended)

Lots of Bandaids and bring your swear jar, You'll fill it up guaranteed!

[Fatal129]

So red tops are in and ficm tested fine and full tank with diesel kleen is in hopefully it's just that because I don't think it's the icp because it wouldnt mess up my fuel guage


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