Cuts Out, Misses

Inspections	Action
DEFINITION: A jerking that follows engine speed, usually more pronounced as the engine load increases which is not normally felt above 1,500 RPM or 48 km/h (30 mph).
Preliminary	Refer to Symptoms - Engine Controls .
Ignition System	Inspect the spark plugs for the following conditions: Insulation cracks Wear Improper gap Burned electrodes Heavy deposits The ignition system for moisture, dust, cracks, burns, etc.
Engine Mechanical	Perform a cylinder compression check. Refer to Engine Compression Test in Engine Mechanical. Inspect the engine for the following: Improper valve timing Worn rocker arms-Refer to Valve Rocker Arm and Valve Lash Adjuster Cleaning and Inspection in Engine Mechanical. Worn camshaft lobes-Refer to Camshafts Cleaning and Inspection in Engine Mechanical. Broken or weak valve springs-Refer to Upper Engine Noise, Regardless of Engine Speed in Engine Mechanical. Inspect the intake and exhaust manifold passages for casting flash.
Fuel System	Test the fuel pressure. Refer to Fuel System Diagnosis . Inspect for water contamination in the fuel. Refer to Alcohol/Contaminants-in-Fuel Diagnosis (with Special Tool) or Alcohol/Contaminants-in-Fuel Diagnosis (without Special Tool) . Perform the fuel injector coil test. Refer to Fuel Injector Coil Test .