Base Engine Misfire with Abnormal Internal Lower Engine Noises

WARNING: This page is about a different car, the 2007 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.

BASE ENGINE MISFIRE WITH ABNORMAL INTERNAL LOWER ENGINE NOISES

Cause	Correction
Abnormalities, severe cracking, bumps or missing areas, in the accessory drive belt Abnormalities in the accessory drive system and/or components may cause engine RPM variations, noises similar to a faulty lower engine and also lead to a misfire condition. A misfire code may be present without an actual misfire condition.	Replace the drive belt. Refer to DRIVE BELT REPLACEMENT .
Worn, damaged, or mis-aligned accessory drive components or excessive pulley runout A misfire code may be present without an actual misfire condition.	Inspect the components, repair or replace as required.
Loose or improperly installed engine flywheel or crankshaft balancer	Repair or replace the engine flywheel and/or crankshaft balancer as required.
A misfire code may be present without an actual misfire condition.	Refer to ENGINE FLYWHEEL REPLACEMENT or CRANKSHAFT BALANCER REPLACEMENT .
Worn or Broken Piston Rings Oil consumption may or may not cause the engine to misfire.	Inspect the spark plugs for oil deposits. Refer to SPARK PLUG INSPECTION for the 3.6L engine. Inspect the cylinders for a loss of compression. Refer to ENGINE COMPRESSION TEST . Perform cylinder leak down and compression testing to determine the cause. Repair or replace as required.
Worn Crankshaft Thrust Bearings Severely worn thrust surfaces on the crankshaft and/or thrust bearing may permit fore and aft movement of the crankshaft and create a DTC without an actual misfire condition.	Replace the crankshaft and bearings as required.