Rough running if not plugged in.
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Trailering
Joined: Nov 2011
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Rough running if not plugged in.
I don't know if anyone else has experienced this. When this truck is plugged in, it runs like a new truck. If its 30* or below and its not plugged in it runs like an old D-8 CAT on a cold day, until it warms up. I bought this truck new in 05 and I don't remember it being this bad. Unfortunately I can't keep it plugged in a work. So is this normal with age or is there some other problem? THANKS in advance!
Logistics Pro
Joined: Dec 2004
Posts: 4,138
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From: South Weber, Utah
If the FICM is having a voltage problem it will show up when it is cold as things contract when they cool and expand when heated so you would see the problem surface when the FICM is cold gradually getting better as it warms and completes the connection.
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Along the same lines, the injectors are known for "Stiction." Long story short, stiction is a combo of Sticking and Friction. The injector spools, which are moved by engine oil, cannot move freely. They stick and when they do the injector does not fire properly when means again the engine runs like butt until the spools, oil and injector heat up allowing them to move freely.
Diagnostics would start with checking FICM voltage KOEO, crank and cold start low idle and high idle.
Josh
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Well it Kinda is Related to your New Oil
your Old Oil was sheared thinner than the New Oil refer to josh post for the rest the storey
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Trailering
Joined: Nov 2011
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Rotella, which is 15W-40 I think. I will try and find someone who can check the FICM voltage, and go from there. Thanks again!
Elder User
Joined: Apr 2013
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From: Bothell, WA
Checking the FICM voltage isn't difficult. There are some nice YouTube videos on the subject, and a write up in the tech folder. Or you can use a scan guage/torque/dashboss. You've had the truck a long time, do you already own a guage to read live data?
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I will add that if the issue just recently cropped up, it is likely a FICM issue.
I would tend to think Stiction would be a gradual problem that would slowly get worse and not just pop up one day and not be there before.
Josh
I would tend to think Stiction would be a gradual problem that would slowly get worse and not just pop up one day and not be there before.
Josh
Elder User
Joined: Apr 2013
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From: Bothell, WA
I don't know much about the bulldog, but I would hope it could read FICM main voltage. That's the place to start. If you don't trust what it's telling you, then you could venture to the land of manually checking it.
Posting Guru
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Like said, check your ficm voltages first. Then, change to 5w-40 synthetic and add rev x treatment to it. I had a bad case of stiction and after adding rev x and running it for a week or so the difference was night and day. Im not a big fan of oil additives, but i can say that it worked for me.