Join Date: Feb 2011
Location: East of Seattle
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It has to do with the internal power supply in the FICM. My 06 was doing the same thing but dropped as low as 30V on cold mornings. Finally set off the check engine light and set injector voltage low codes so the dealer warranty it.
I was lucky, 1 month till the warranty expired. Next one will be on me and it will be the soon to be released one from BPD.
The new OEM that was installed has held steady at 47.5V - 48V no matter the temp. for the last year that it has been in. about 8000 miles or so.
Replace it before you fry your injectors or it will cost you a bundle more to replace some of them too.
2006 Lariat FX4
Glowshift 3 in 1 Pyro, Trans, Boost.
EDGE Evolution CS
Fuel Pressure Spring
Upfitters,#2 Heated mirror, #3 High Idle, #4 GlowShift Dimmer
Things to do!
Banjo Bolts (Have)
Fuel pressure Gage (Edge?)
Upfitter uses, #1 ?, (? = Ideas wanted)
Others, of course