Join Date: Oct 2010
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Need Ideas on Possible Causes
Started having problems with FICM voltage dropping to approximately 44 volts after starting. Noticed this when Edge CTS started alarming just after starting. Set to monitor battery voltage at same time and have noticed that battery voltage just after cranking is at 11.1v to 11.6v. Seems as soon as battery voltage starts going up, which is generally in about 30 seconds or so and into the 12v range the FICM voltage also increases and when the battery voltage reaches the 13.2v range, the FICM voltage runs 47v-48v.
This happened last winter and I had the batteries and charging system checked and was told that there was no problem.
I did notice tonight that the main line on the alternator is very hot to touch. Any suggestions will be greatly appreciated. Thanks in advance.
2005 6.0 PSD F-250 SC LB 4X4 Auto
Engine Hi-Idle Mod
AIRAID CAI, zoodad mod,
4" Turbo back exhaust
Coolant Filter & Flushed and changed to CAT ELC
Sinister EGR Cooler Delete
Updated Fuel Pressure Regulator Spring (Blue)
ECM/TCM with VXCF4 Strategy
PHP FICM Programmer-(Economy,Atlas 40,Atlas 80,Hercules)
PHP Gryphon CTS monitoring ECT,EOT,TFT,Boost,FICM Voltage & 5 Custom Tunes
(Oil bypass filter system to be added next.)