Possibly need to establish correct terminology before proceeding. It appears you have a 99 with the cable throttle. This style throttle body has an IACV (idle air control valve) I believe this is what the tech is calling idle stabilizer?? JFP might confirm. If this is cracked and installed with no gasket it may be the problem and is easily replaced. It is the black device on the right side of your throttle body picture. No need to replace TB. Hope this helps.
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