Initial ignition skip (Chevrolet Captiva 1 2006-2018: Engine FAM II 2.4D: Troubleshooting)

Initial misfire without internal engine noise

Cause	elimination
High oil pressure.	Check oil pressure. See "Oil pressure check"in this section. Repair or replace damaged components as necessary.
Worn, damaged, or improperly installed accessory drive belt. It has cracks, bumps, or missing segments. A misfire DTC can occur without the actual conditions causing the misfire.	Carefully inspect the components of the accessory drive system. Repair or replace damaged components as necessary. See Section 1C1, Engine Mechanical - FAM II 2.4D.
Worn, damaged, or incorrectly installed accessory drive system components. A misfire DTC can occur without the actual conditions causing the misfire.	Carefully inspect the components of the accessory drive system. Repair or replace damaged components as necessary.
Damaged, loose or incorrectly installed crankshaft pulley. A misfire DTC can occur without the actual conditions causing the misfire.	Check the crankshaft pulley. Repair or replace damaged components as necessary. See Section 1C1, Engine Mechanical - FAM II 2.4D.
Worn, damaged, or incorrectly installed crankshaft breaker gear. A worn or damaged crankshaft breaker gear can cause a variety of symptoms depending on the severity and location of the wear or damage. Electronic communication systems, direct ignition system (DIS) or the ignition coil on each cylinder, with significant damage to the chopper gear ring, may show intermittent loss of crankshaft position, loss of signal, and then restoration of crankshaft position. Electronic communication systems, direct ignition system (DIS) or the ignition coil on each cylinder, with minor damage to the breaker gear ring, may show no misfiring and loss of the specified position of the crankshaft. Mechanically coupled systems, a high voltage switch, if the breaker gear ring is significantly damaged, can cause additional impulses, affect the fuel supply and the ignition spark supply.	Check crankshaft position sensor. Carefully inspect the crankshaft breaker gear. Check crankshaft. Repair or replace damaged components as necessary.
Damaged, loose or improperly installed engine flywheel. A misfire DTC can occur without the actual conditions causing the misfire.	Check the flywheel. Repair or replace damaged components as necessary. See Section 1C1, Engine Mechanical - FAM II 2.4D.
Damaged, improperly installed or clogged exhaust system, broken or kinked pipes, clogged mufflers, or failed catalytic converters. Diagnostic trouble code (DTC) may occur without the actual conditions causing the malfunction.	Check exhaust system components. Repair or replace damaged components as necessary.
Worn, damaged or incorrectly installed vacuum hoses.	Check vacuum system components. Repair or replace damaged components as necessary.
Damaged or incorrectly installed manifold absolute pressure sensor; cut, torn or missing rubber grommet.	Check manifold absolute pressure sensor. Repair or replace damaged components as necessary.
Damaged or incorrectly installed electronic throttle body.	Carefully inspect the electronic throttle body. Repair or replace damaged components as necessary.
Damaged or incorrectly installed intake manifold.	Check intake manifold. Repair or replace damaged components as necessary.
Damaged or incorrectly installed cylinder head. Oil consumption may or may not cause engine misfiring.	Check spark plugs. Cm. "Checking the spark plug" in this section "Engine controls". Check engine compression. See "Compression pressure test"in this section. Carefully inspect the cylinder heads. Check engine block. Repair or replace damaged components as necessary.
Worn, damaged, loose or broken valve spring.	Check valve springs. Repair or replace damaged components as necessary.
Worn or damaged valve stem, carbon on valve seat or stem.	Check valves. Check valve guides. Repair or replace damaged components as necessary.
Worn or damaged valve guide.	Check valve guides. Carefully inspect the valve guides and the valves themselves. Repair or replace damaged components as necessary.
Worn, damaged or dirty valve tappet.	Check the valve lifters. Check the camshaft. Repair or replace damaged components as necessary.
Worn or damaged camshaft cam.	Check the camshaft. Check the valve lifters. Repair or replace damaged components as necessary.
Worn, damaged or loose drive belt and timing sprockets	Carefully inspect the timing belt and sprocket. Repair or replace damaged components as necessary.
Worn, damaged or incorrectly installed piston. Pistons must be installed properly with the marking or indentation on the top surface of the piston facing the front of the engine; The piston pins must be centered in the connecting rod pin hole. Oil consumption may or may not cause engine misfiring.	Check spark plugs. Cm. "Checking the spark plug" in this section. Check engine compression. See "Compression pressure test"in this section. Carefully inspect the cylinder bores. Check pistons. Check piston pins. Check the cranks. Repair or replace damaged components as necessary.

Initial misfire with abnormal interior noises at the bottom of the engine

Cause	elimination
Worn, damaged, or improperly installed accessory drive belt. It has cracks, bumps, or missing segments. A misfire DTC can occur without the actual conditions causing the misfire.	Carefully inspect the components of the accessory drive system. Repair or replace damaged components as necessary. See Section 1C1, Engine Mechanical - FAM II 2.4D.
Worn, damaged, or incorrectly installed accessory drive system components. A misfire DTC can occur without the actual conditions causing the misfire.	Carefully inspect the components of the accessory drive system. Repair or replace damaged components as necessary. See Section 1C1, Engine Mechanical - FAM II 2.4D.
Worn, damaged, incorrectly installed or insufficiently secured crankshaft pulley. A misfire code may appear without the actual conditions causing the misfire.	Check the crankshaft pulley. Repair or replace damaged components as necessary. See Section 1C1, Engine Mechanical - FAM II 2.4D.
Worn, damaged, incorrectly installed or insufficiently secured engine flywheel. A misfire code may appear without the actual conditions causing the misfire.	Check engine flywheel. Repair or replace damaged components as necessary. See Section 1C1, Engine Mechanical - FAM II 2.4D.
Worn, damaged or incorrectly installed piston. Pistons must be installed properly with the marking or indentation on the top surface of the piston facing the front of the engine; The piston pins must be centered in the connecting rod pin hole. Oil consumption may or may not cause engine misfiring.	Check spark plugs. See Section 1A2, General Engine Data - FAM II 2.4D. Check engine compression. See "Compression pressure test"in this section. Carefully inspect the cylinder bores. Check pistons. Check piston pins. Check the cranks. Repair or replace damaged components as necessary. See Section 1C1, Engine Mechanical - FAM II 2.4D.
Worn, damaged or incorrectly installed crankshaft thrust bearing. A misfire code may appear without the actual conditions causing the misfire.	Check crankshaft. Check the crankshaft thrust bearing. Repair or replace damaged components as necessary.

Initial misfire with abnormal valve train noises

Cause	elimination
Worn or damaged valve stem, carbon on valve seat or stem.	Check valves. Check valve guides. Repair or replace damaged components as necessary.
Worn, damaged or dirty valve tappet.	Check the valve lifters. Check the camshaft. Repair or replace damaged components as necessary.
Worn or damaged camshaft cam.	Check the camshaft. Check the valve lifters. Repair or replace damaged components as necessary.
Worn, damaged or loose timing belt or loose sprockets.	Carefully inspect the timing belt and sprocket. Repair or replace damaged components as necessary.

Initial misfire with coolant flow

Cause	elimination
Damaged or incorrectly installed cylinder head. Coolant consumption may or may not cause engine misfiring.	Check spark plugs. See Section 1C1, Engine Mechanical - FAM II 2.4D. Check engine compression. See "Compression pressure test"in this section. Carefully inspect the cylinder heads. Check engine block. Repair or replace damaged components as necessary.

Initial misfire with excessive oil consumption

Cause	elimination
Worn or damaged valve.	Check valves. Check valve guides. Repair or replace damaged components as necessary.
Worn, damaged or incorrectly installed piston rings. Piston rings must be installed properly with the marking or indentation on the top surface of the piston ring facing up.	Check spark plugs. See Section 1A2, General Engine Data - FAM II 2.4D. Check engine compression. See "Compression pressure test"in this section. Carefully inspect the cylinder bores. Check pistons. Check piston pins. Check the cranks. Repair or replace damaged components as necessary.