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Old 03-03-2012, 11:42 AM
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Scan Guage 2

Just got my scanguage 2 in and hooked up. I have been entering some x guage codes and there are two for the ficm. 1 for FICM main voltage and 1 for FICM logic voltage. I programmed the one for the main power and got 49 volts before starting and 28 volts after it fired up. The truck has had a hard time starting lately too. Is the main power im reading the one that should stay at 48V? Any other recomendations on guages I should watch? I already have EOT and ECT up there. My other guages are pod guages in my sig. Thanks for the help. Dustin
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Old 03-03-2012, 02:29 PM
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Your FICM is done. If those are your readings. A bad FICM has been known to take out injectors. Also, enter the other FICM gauge FICM Vehicle power. It will show you what kind of voltage is being sent to your FICM.

But, your FICM right now need attention. FICMrepair.com is a very good place. Or, you can try to re-solder yourself. Detailed FICM Repair Procedure - Ford Truck Enthusiasts Forums

Or, swamps diesel
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Old 03-03-2012, 02:31 PM
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Also, most of the other gauges for the ScagaugeII will be a lot for diagnostics.

Here is a good list of Xgauges with operating values for most.

Some Sc II codes for "Xgauge" (Now injectors) - Page 12 - Ford Truck Enthusiasts Forums

The ones in bold haven't been shown yet to work.

All operating values are when engine is "hot".

High idle for these is based on 2500 rpm
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Old 03-03-2012, 03:24 PM
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So which is the more important reading? Main power voltage or logic power voltage?
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Old 03-03-2012, 03:26 PM
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Main power for sure. That is the one that will really show the health of your FICM. That's the one that mainly goes out.
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