Appraisers have had it with pressure from lenders trying to influence their property value assessments by threatening to withhold future business. Last month the Appraisal Institute sent a letter to the banking committees in the House and Senate calling for congressional hearings on "inappropriate lender pressure." "Our members report that, too often, real estate mortgage creditors, lenders, and realty agents apply undue influence on an appraiser to artificially "make the value" on a property being