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Got a few WOT runs from a stop to about 85 mph. The truck runs OK but I know it could benefit from some advice from some of you tuning gurus. I really do not have much of a clue what I should be looking for to improve upon. Knock retard maxed out at 5.5 on one and 8 on the other run, which is...

Intermittent high idle. When I put it in neutral when rolling up to a stoplight, the RPM's go up to about 1500, then settle back down to about 900. As soon as I put it back in drive the engine loads up on the tranny and wants to move w/o giving it any gas. On Diacom when this happens it shows...

Did a few searches and didn't come up with much, so... Is a tranny flush at a shop the way to go when changing the fluid? I have talked to a few tranny shops and they said they don't recommend it, rather they recommend letting the fluid drain and cleaning the pan out. They said the flush just...

So my truck seems to like to idle high. It has tended to do this for awhile. When it is in drive and I let off the brake, it wants to move on its own. Right away i am thinkin vac. leak. I have a new kit on the way, but is there anything I can check out on Diacom/underhood in the meanwhile...