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2003 6.0. 95K miles.
I recently replaced a battery hoping that would alleviate the problem. The other battery was replaced in May. I place a charger on it at night to insure that they are both charged, because I read that it may be a voltage issue. It has only been a problem since it got colder, although it is always garaged.
I won't try to start it for about 10-15 seconds after the "glow plug light" goes out. Sometimes I will recycle, to see if it makes a difference. It will usually start, but not until the third or fourth try of about 10 seconds or so. I have a feeling that it may be a fuel pressure issue. I am anything but a mechanic, but that is what my gut is telling me. After starting, it almost always starts right up unless it sits for an hour or so.
I will take it to a mechanic, but I would also like to have an idea of your thoughts.
Thanks in advance.
How's your FICM voltage? Should be 48 volts. Hopefully, you have a scanner that can read the codes from the OBD port. Low batteries can kill your FICM if not caught soon enough. Bad FICMs can kill injectors. Not saying that's the problem, but you had battery troubles and starting systems struggle in cold weather.
I had similar symptoms years ago. Here's a data log screen capture of my FICM voltage using AutoEnginuity. Scale for Battery voltage on the left, FICM on the right (dark blue trace). The FICM voltage falters below 48, down to about 43.2, then recovers. I post to show that sticking a voltmeter on the FICM for a few moments might give a false indication if not checked over a long enough period. A monitor of some kind sure makes life simpler.
You can't diagnose anything with this truck without data. An adapter and cell phone software is cheaper than any generic scanner and won't give you false or incomplete data.
Yeah, a generic OBDII reader isn't much help. I'm not up on the latest and greatest. My in-truck monitor is a little dated and not even offered anymore, although I think the nDash is its progeny. Mine is a DashDAQ-XL with Ford package. I see lots of mentions of the Torque app and FORscan. Are those the two most go with now if they don't have a tuner? Is there a consensus which is better?
The DashDAQ wasn't cheap, so I'm kind of invested but it's still pretty useful. I could make it more so since it has two auxiliary analog sensor input channels. Priorities to add would be fuel pressure and coolant pressure. Wouldn't mind having oil pressure too.
I have a DASHDAQ XL, it does both FICM Main Power and Logic Power.
I wasn’t aware it wasn’t a good code reader, perhaps it’s time to get one of the ForScan versions.
Mine will absolutely not properly read the 48 volt FICM power (only shows a max of 12 volts). What is your PID labeled? It has been a long time since I looked on their forum, but they didn't have a way identified then - say maybe 2012 time frame.
I’ll check tomorrow morning when I get back in the truck
I got the full Ford PID’s around 2015-2016, so maybe it was updated...but I think I remember them saying FICM Main Power was named something that wouldn’t make you think it was FICM Main Power, and I had to rename it.
I’ll check tomorrow morning when I get back in the truck
I got the full Ford PID’s around 2015-2016, so maybe it was updated...but I think I remember them saying FICM Main Power was named something that wouldn’t make you think it was FICM Main Power, and I had to rename it.
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