My 1990 2wd pickup has a 22re with California emissions equipment. When the engine is cold it idles at a super high rpm. As the engine warms, the idle pulses until warm. The problem seems to be getting worse because "cold" is now anything under 100 degrees outside. I once read about a cold motor sensor that adjusts the timing increasing the idle to speed engine warm up. Any advice on this? It's driving me crazy!!