I have a late 99 that I put a six pos chip in and am having some problems. Only other mod is 4" exhaust. First problem is the high idle. I'm thinking it is higher than it is supposed to be. It jumps up to about 2200 rpms? Second is on the stock tune the truck feels like it barely has any power. I have been running it on the 100 hp tune on a regular basis. The chip also has the generic tunes on it. I have not contacted ts yet just seeeing if anyone else has experienced this?