Vacuum Routing Diagrams — Ford Bronco 1987-1991

Technical Reference

Member-uploaded diagrams & documents for this generation. AI-classified; community-verified where badged.

Vacuum Routing

• Ford Thermactor Combination Valve Diagram - Air Bypass/Control Ports Labeled
  This document is a labeled line drawing of a Thermactor secondary air system combination (bypass/diverter) valve, as used in Ford emissions systems. The illustration identifies six key features of the valve with…
• 1993 Ford 5.0L California VECI Label - Vacuum Hose Routing & Timing Specs
  This document is a Vehicle Emission Control Information (VECI) label from Ford Motor Company for a 1993 model year light-duty truck with the 5.0L (HM) engine, certified for sale in California and OBD I certified. It…
• 1993 Ford Bronco 49-State VECI Vacuum Hose Routing Diagram - EGR, AIR, CANP
  This document is a color-coded vacuum hose routing diagram for a Ford truck emissions/vacuum system, uploaded as a 1993 49-state VECI (Vehicle Emission Control Information) schematic to a 1990 Ford Bronco gallery. The…