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Message: [QUOTE="Gary, post: 1158676, member: 675"] [COLOR="Red"]One thing that did seem maybe off was that the ICP stays at around 100psi while off and it will hold that pressure even for a few days of truck sitting, this is also verified by mechanical gauge that it is holding pressure.[/COLOR] [COLOR="Black"]^^ That kind of odd, where are you reading ICP from? the ICP port by the IPR? [/COLOR] Look at the ICP pressure vs voltage, with the key on you should see 1.1v, if you see anything much different you have a biased sensor. Then unplug the ICP connector and see if it goes to 0 voltage. FWIW, I have had a no-start 6.0 that the problem was the FICM, and all the voltages were good, I plugged in a known good one and it fired up. [/QUOTE]

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