Join Date: Apr 2008
Location: Moyock, NC
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Did a little research.
The IDM (you are getting power to) is controlled by the ECM. Let's see if I can make sense of this. I can see it in my head, but putting it on paper is a little difficult.
If the IDM was bad, you will get codes. It performs a self check everytime it is powered up. Now, here is where all the sensors come into play.
The ECM goes through self checks when powered up (the check engine light briefly illuminates when key is turned on), at the same time the IDM is self checking itself.
Power to the IDM is supplied by the ECM via an IDM relay.
ICP tells the ECM the pressure in the oil rails and the ECU in turn controls the ground to the IPR to regulate the amount of pressure it is demanding. Once the ECM is satisfied those parameters are met, it will send a signal to the IDM to fire the injectors. Now, if any of the following sensors are out of whack, the signal to fire will NOT happen - IPR, ICP, EBP. That could be why you aren't getting any voltage to your injectors.
Does that make any sense?
I would check the IDM relay. Unplug the ICP (sets a reference voltage and will allow the engine to fire if sensor is bad). Check the IPR orings and IPR itself. Check EBP circuit. Look at all fuses and check with a multimeter. Tap on all the relays.
05 F250 4x4 CC, 9.5" Rize/Icon, 38" Toyos, 20x12 Pacers, 5" MBRP, AFE stage 2, Cass 190s, Powermax, ELC w/filter, RCD EGR delete
04 Excursion 4x4, vacation bus
Project 1979 F250 6.0 powered in progress
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