Dear List My 86 5000CSTQ is idling about 1900-2300rpm and then after a few minutes will drop to a normal 900. Works fine in the morning when cold for a few minutes then goes into it's high idle routine. I have checked for air leaks and can't find any, have also replaced the idle stabilizer with no affect. Any ideas? Thanks Bill 86 5000CSTQ 91 100S 71 Chevelle 454SS