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HOMESERVICE MANUALSFORD1999WINDSTAR BASE, VAN CARGO, 3.8 4REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1805 (ENGINE SYSTEM - GENERAL INFORMATION)DIAGNOSIS AND TESTINGENGINESYMPTOM TABLE - ENGINE PERFORMANCE
1999 Ford Windstar Base, Van Cargo, 3.8 4

Symptom Table - Engine Performance

1999 Ford Windstar Base, Van Cargo, 3.8 4SECTION Symptom Table - Engine Performance
WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM TABLE - ENGINE PERFORMANCE

Condition Possible Sources Action
  • Difficult starting
  • Inoperative or damaged ignition system
  • Air or vacuum leak
  • Inoperative or damaged fuel system
  • Inoperative or damaged starting system
-
  • Damaged charging system/battery
-
  • Burnt valve
  • INSTALL a new cylinder head. TEST the system for normal operation after the repair.
-
  • Worn piston
  • INSTALL a new piston. TEST the system for normal operation after the repair.
-
  • Worn piston rings
  • INSTALL new piston rings. TEST the system for normal operation after the repair.
-
  • Worn cylinder
  • INSTALL a new cylinder block. TEST the system for normal operation after the repair.
-
  • Damaged head gasket
  • INSTALL a new cylinder head gasket. TEST the system for normal operation after the repair.
-
  • Inoperative or damaged cooling system
-
  • Fail-safe cooling invoked (if equipped)
  • Poor idling
  • Vacuum leaks
  • Inoperative or damaged EGR system
-
  • Inoperative or damaged ignition system
-
  • Inoperative or damaged cooling system
-
  • Inoperative or damaged fuel system
 -
-
  • Fail-safe cooling invoked (if equipped)
-
  • Incorrect valve clearance
  • ADJUST valve clearance. Refer to ENGINE (2.5L), ENGINE (Hybrid), ENGINE (3.0L) and ENGINE (3.5L) for the procedure. TEST the system for normal operation after the repair.
-
  • Incorrect valve-to-valve seat contact
  • INSTALL a new cylinder head. TEST the system for normal operation after the repair.
-
  • Damaged head gasket
  • INSTALL a new cylinder head gasket. TEST the system for normal operation after the repair.
  • Engine runs rough
  • Inoperative or damaged fuel system
  • Air or vacuum leaks
  • EGR system fault
  • Inoperative or damaged cooling system
  • Inoperative or damaged ignition system
-
  • Fail-safe cooling invoked (if equipped)
-
  • Burnt or sticking valve
  • INSTALL a new cylinder valve. TEST the system for normal operation after the repair.
-
  • Weak or broken valve spring
  • INSTALL a new valve spring. TEST the system for normal operation after the repair.
-
  • Carbon accumulation in combustion chamber
  • ELIMINATE carbon buildup. TEST the system for normal operation after the repair.
  • Excessive oil consumption
  • Leaking oil
  • REPAIR oil leakage. TEST the system for normal operation after the repair.
-
  • Inoperative PCV system
  • REPAIR or INSTALL new components as necessary. TEST the system for normal operation after the repair.
-
  • Incorrect oil
  • CHANGE oil to correct specification.
-
  • Worn valve stem seal
  • INSTALL a new valve stem seal. TEST the system for normal operation after the repair.
-
  • Worn valve stem or valve guide
  • INSTALL a new cylinder head. TEST the system for normal operation after the repair.
-
  • Sticking piston rings
  • INSTALL new piston rings. TEST the system for normal operation after the repair.
-
  • Worn piston ring groove
  • INSTALL a new piston and piston pin. TEST the system for normal operation after the repair.
-
  • Worn piston or cylinder
  • INSTALL a new piston or cylinder block. TEST the system for normal operation after the repair.
  • Oil in coolant
  • Leaking head gasket
  • Damaged cylinder block
  • Damaged cylinder head
  • INSPECT the engine components. INSTALL new engine components as necessary. Refer to ENGINE (2.5L), ENGINE (Hybrid), ENGINE (3.0L) and ENGINE (3.5L) for the procedure. TEST the system for normal operation after the repair.
  • Coolant in oil
  • Leaking head gasket
  • Damaged cylinder block
  • Damaged cylinder head
  • INSPECT the engine components. INSTALL new engine components as necessary. Refer to ENGINE (2.5L), ENGINE (Hybrid), ENGINE (3.0L) and ENGINE (3.5L) for the procedure. TEST the system for normal operation after the repair.
  • Insufficient power
  • Inoperative or damaged ignition system
  • Air intake system blockage
  • Lubrication system blockage
  • Inoperative or damaged fuel system
-
  • Oil level too high
  • DRAIN oil to correct level. TEST the system for normal operation after the repair.
-
  • Incorrect engine oil
  • INSTALL correct specification engine oil. TEST the system for normal operation after the repair.
-
  • Excessive accessory drive belt loading
  • Inoperative or damaged cooling system
-
  • Fail-safe cooling invoked (if equipped)
-
  • Damaged or plugged exhaust system
  • INSPECT exhaust system. TEST the system for normal operation after the repair.
-
  • Incorrect tire size
-
  • Dragging brakes
-
  • Slipping transmission
-
  • Incorrect valve clearance
  • ADJUST valve clearance. Refer to ENGINE (2.5L), ENGINE (Hybrid), ENGINE (3.0L) and ENGINE (3.5L) for the procedure. TEST the system for normal operation after the repair.
-
  • Worn or damaged valve tappet
  • INSTALL a new valve tappet. TEST the system for normal operation after the repair.
-
  • Damaged valve guide
  • Compression leakage at valve seat
  • Seized valve stem
  • INSTALL a new cylinder head assembly. TEST the system for normal operation after the repair.
-
  • Weak or broken valve spring
  • INSTALL a new valve spring. TEST the system for normal operation after the repair.
-
  • Worn or damaged cam
  • INSTALL a new camshaft. TEST the system for normal operation after the repair.
-
  • Damaged head gasket
  • INSTALL a new head gasket. TEST the system for normal operation after the repair.
-
  • Cracked or distorted cylinder head
  • INSTALL a new cylinder head assembly. TEST the system for normal operation after the repair.
-
  • Damaged, worn or sticking piston ring(s)
  • INSTALL a new piston ring(s). TEST the system for normal operation after the repair.
-
  • Worn or damaged piston
  • INSTALL a new piston and piston pin. TEST the system for normal operation after the repair.
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.