I have an idle problem with my 92 Toyota pickup. The idle screw is turned up, and starts out high, but as the engine warms up, it will eventually get lower and lower until it completely dies! Not only that but I had to put thread lock on the screw itself because it kept screwing all the way down, not to mention I can turn the idle screw with my fingers! Any suggestions? I have heard many random things to try to fix the problem but want to hear some suggestions from the people who actually know these trucks! Thanks