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Message: [QUOTE="CurtisF, post: 549170, member: 829"] Resurrecting this thread for a point of discussion. After many months, I finally cracked open my tunes to make some adjustments. Overall the changes resulted in a completely smooth idle, better linear pedal feel, and a bit less ICP ramp up which cured some of the cruising low RPM chop that I would get from time to time. Most of the re-work was done in the PW map, as well as a bit with the ICP map. PW map is more linear than before, and ICP doesn't ramp up quite as quickly at part-throttle. However, something odd happened as a result. Even though the idle is perfectly smooth with no chop, I can get a slight glance of a haze that wasn't there before. What's strange is that the PW at idle with the adjustments is actually lower than before (by about .2 ms). I've tried different increments in ICP at idle to see if there was any change, and other than an almost indistinctable difference in tone, nothing changed regarding the haze. I've posted the screen shots of my tunes below. For reference, this is happening on a fully warm engine. In addition to the ICP table below, I have also tried ICP at idle ranging from 475 psi (which is what is in the table), all the way down to 425 psi. If I go any lower or higher, it starts to chop a bit. Pulsewidth (copied to PMT1 for correct numbers, re-scaled for detail) [ATTACH=full]102043[/ATTACH] [ATTACH=full]102044[/ATTACH] ICP [ATTACH=full]102045[/ATTACH] [ATTACH=full]102046[/ATTACH] SOI sea-level [ATTACH=full]102047[/ATTACH] [ATTACH=full]102048[/ATTACH] SOI altitude [ATTACH=full]102049[/ATTACH] [ATTACH=full]102050[/ATTACH] SOI delay [ATTACH=full]102051[/ATTACH] [ATTACH=full]102052[/ATTACH] So that's where I'm at right now. As I said, it runs and drives perfect. Only issue is a slight haze at idle, and you have to be in the right light to even see it. If I can find a way to clear that up, my truck will be tuned exactly as I want it. [/QUOTE]