Losing half my cylinders intermittently
#1
06-12-2018, 09:49 PM
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Losing half my cylinders intermittently
ok so my truck would start last week so after some tests I found a bad IDM. Replaced it and bam truck started and ran great. Then after a day the truck lost 4 cylinders when I floored it. Then it happened a few more times so I figured I gotta bad IDM. New IDM did the same thing I can feel my passenger header get warm and the driver side is hot while its misfiring. So now I’m thinking I gotta injector drawing too much current and IDM is shutting down a bank. I ohms checked from the valve cover and got about 3.8 ohms On all 8 with truck still hot. But don’t know if that’s a valid number since the power wire is shared to two injectors.
#2
06-12-2018, 10:04 PM
Have you checked the UVCH harnesses yet? Notice any burnt pins? Dads truck did something similar a couple years ago. Ended up with a new set of valve cover gaskets, under cover wiring and valve cover plugs. The issue was the valve cover gaskets, but we re did everything while we were there
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06-13-2018, 01:46 PM
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06-13-2018, 02:23 PM
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06-13-2018, 02:24 PM
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06-14-2018, 04:57 PM
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06-14-2018, 10:30 PM
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Alrighty so last night i grabbed my good volt meter and leads from work and did that ohms check from the IDM and all checked good until injector 7. So I messed with the wires and no change so I took off the valve cover and then my numbers kept changing. So long story short I replaced the valve cover then everything tested good. Buuuut the truck dropped cylinders again on my way home 
. So the only thing I can think of was switching to the back fuel tank that I run straight diesel. The front tank I run my home made atf diesel. So we’ll see how that goes cus I’m out of ideas
. So the only thing I can think of was switching to the back fuel tank that I run straight diesel. The front tank I run my home made atf diesel. So we’ll see how that goes cus I’m out of ideas 
#15
06-18-2018, 01:06 PM
My truck did something kinda, sorta like this when I was driving it out of a flood. Mud boat mode. I know it will do it again someday, probably at the worst possible time.
I hooked up Forscan at the time and got codes but I didn't save them. Didn't know any better.
I think you could fix your truck if you could see now what I saw then. I bought an OBDlink MX Bluetooth adapter and downloaded Forscan for free.
I'm never going to become an expert with Forscan but I would be totally lost without it. Forscan and the guys from this forum are the only way I can deal with my truck and its computerized injection system.
I hooked up Forscan at the time and got codes but I didn't save them. Didn't know any better.
I think you could fix your truck if you could see now what I saw then. I bought an OBDlink MX Bluetooth adapter and downloaded Forscan for free.
I'm never going to become an expert with Forscan but I would be totally lost without it. Forscan and the guys from this forum are the only way I can deal with my truck and its computerized injection system.