Alright guys, I’ve posted about this before, but it’s still bugging me and I want to start a fresh thread to see if I can get some of your minds moving.
So this started when I put my motor back together and installed it in the truck. I had it completely rebuilt top to bottom, bored .020” over, full ford overhaul kit etc etc.
Now when the truck gets hot, the truck gets a little shakey and the idle will fluctuate up and down a bit. It will do it randomly too, never rhythmic or anything. The hotter it is, the worse it gets. It’s not super bad where I think it’s going to stall or anything but an annoying shake. When cold, the truck runs as smooth as any ‘17 6.7 I’ve ever seen.
With the scanner plugged in, IPR% is always a constant 6.5% to 7%, but exactly when the idle fluctuates, ICP
value will go from a steady 425 to 500-525, then back down.
So, what’s the first step any of you would do to diagnose this. I’ve already done a lot, but I want to start from the beginning.
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1996 Cali F350 CCFB, 7.3 PSD, 2wd SAS, w/ 378,000 miles.
New Motor at 352,000, DieselSite Legendary Trans at 356,000 and many more