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Message: [QUOTE="maplemale, post: 1135586, member: 17366"] Good to know on the opacity. I wasn't sure how much of an increase is normal. I'm sure Matt could get it lower if I asked him, but as long as it passes I don't care. No negative results from glow plug tests. I was expecting/hoping their would be. :cursing: All ohm out correctly, GPCM is working correctly, all getting the correct voltage etc. Was able to start the truck at 15 degrees with no issues. So, that starting issue is random and maybe unrelated. The truck runs well otherwise, but I'll give you some more bladeebla below. Sorry for long post. Going to be thorough here. Compression Numbers about 10k miles ago: #2: 350 (406 - altitude adjusted) #4: 340 (395) #6: 350 (406) #8: 350 (406) #1: 340 (395) #3: 335 (389) #5: 335 (389) #7: 330 (383) PS: I have zero blow by. I'm going to check the cranking ICP when I fire her up tonight. Here's what I know from memory: Idle at 600 RPMs, the ICP is about 480PSI. WOT is about 3100 PSI. The Duty Cycle idling is always right at 10.9% and never over 40% at WOT. The HPOP was actually rebuilt 30k miles ago according to the Oasis report. Some things I've always thought were odd but others find normal: :blah: 1. My boost gauge reads a vacuum at idle. About 0.8 vacuum. Always thought this was weird. 2. Once it's warmed up, my injector pulse width changes at idle from about 1750 - 1850 in rhythm as does the idle. Idle sounds smooth, but is definitely bouncing up and down maybe 50 - 75 RPMs every 2-3 seconds. Lots of people told me this is normal in the Excursion / theirs does it too. :shrug: 3. When I'm slowing down from about 40 MPH coming to a stop (foot on the brake), she sounds like a 72 Chevelle with a big cam. Injector pulse will bounce between 1600 and 600 over and over again until I'm almost at a stop, then smooths out. I've asked Larz about this, he says it's normal with my tunes and the truck is searching for the right fuel. You can hear it. Literally sounds like you have an oversize cam or something. 4. My normal idle is about 600 RPMs when first starting the truck. Unless of course it's cold. Then, after a minute or two it automatically increases as it should. However, after I've been driving around, especially if I've been driving a bit hard, the idle will be 780 - 800. It won't go back to 600 until I restart. Those are all the weird things I've ever noticed, all of which people have told me are nothing. Other than being hard to start, and cold smoking like a freight train, she runs like a dream. [/QUOTE]