Well, it must be something attached to global warming. Everything you guys are describing sounds exactly like my truck for the last 2 months. I checked the EGR, all the sensors I could find, VSVs, removed and cleaned the throttle body and reset the TPS, and it still runs like there is no vacuum advance. <img src="/forums/images/graemlins/angry.gif" alt="" />Since my brakes are also acting up, I am now beginning to suspect the vacuum brake booster is leaking and there is a "path" causing vacuum leak symptoms.

Richard S.
88 Toy 4x4 Truck, 22RE, 3"BL, 5-Speed, Muds
Proud to be an American. Blessed to be a Texan!