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ter/regulator. It is also the most rearward of the (c) Install Special 5/16” Fuel Line Adapter Tool # 6539 between disconnected fuel line and filter/reg- (d) Attach 0–60 psi fuel pressure test gauge to “T” fitting on tool 6539. (e) Use DRB scan tool to power fuel pump. If pressure is now within specifications, replace fuel (f) If pressure is still low, replace fuel pump module. Fig. 8 Test Port Cap Location—4.7L V-8 Engine 1 – MOUNTING BOLTS (4) Fig. 9 Fuel Pressure Test Gauge (Typical Gauge Installation at Test Port) 1 – SERVICE (TEST) PORT Fig. 10 Fuel Filter/Fuel Pressure Regulator Location 1 – FUEL SUPPLY LINE (TO FUEL RAIL) 14 - 8 FUEL SYSTEM WJ DIAGNOSIS AND TESTING (Continued) |