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Left Cylinder Head Check

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  1. Remove high pressure hose from left cylinder head. Using fuel/oil/turbo protector cap set, install appropriate cap on high pressure hose fitting on cylinder head. Using oil high pressure leakage test adapter set, install ICP adapter into high pressure hose. See Fig 1.
  2. Remove ICP sensor and install sensor in end of ICP adapter. Install ICP/EBP Adapter Cable (D94T-50-A) between ICP sensor and sensor wiring harness connector. Connect a DVOM between SIG RTN circuit (Black wire) and ICP Signal circuit (Green wire) at ICP/EBP adapter cable. Observe DVOM and crank engine. Voltage reading should be1-4 volts.
    WARNING: In the following step, engine may start.
  3. If engine starts, or if ICP PID reading indicates 500 psi (3448 kPa) or more, a injection control pressure oil leak exists in left cylinder head. Reconnect high pressure hose to left cylinder head. Remove left valve cover. Crank engine, and inspect injector body and injector bore area for oil leakage. Repair as necessary.
  4. If injection control pressure is still low after completing both right and left cylinder head checks and no oil leaks have been found, remove high pressure hose from right and left cylinder heads. Using fuel/oil/turbo protector cap set, install appropriate cap on high pressure hose fitting on each cylinder head.
  5. Using oil high pressure leakage test adapter set, install plug into each high pressure hose. Both high pressure lines should now be blocked off. Using scan tester, observe ICP PID reading while cranking engine.
  6. If PID reading is still less than 500 psi (3448 kPa), replace Injection Pressure Regulator (ICP) with a known good ICP and retest. If PID reading is now 500 psi (3448 kPa) or more, replace ICP. If PID reading is still less than 500 psi (3448 kPa), high pressure pump or high pressure pump drive gear is faulty. Repair as necessary.
Fig 1: Equipment Hookup For Injection Control Pressure Test
G95B35759Courtesy of FORD MOTOR CO.
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