Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2008HHR SS, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 5 (ENGINE CONTROLS AND FUEL - 2.4L - INTRODUCTION (2 OF 2))
2008 Chevrolet HHR SS, Automatic
Section 5 (Engine Controls And Fuel - 2.4L - Introduction (2 Of 2))
2008 Chevrolet HHR SS, AutomaticSECTION Section 5 (Engine Controls And Fuel - 2.4L - Introduction (2 Of 2))
WARNING: This page is about a different variant/trim than selected.
- Specifications
- Schematic and Routing Diagrams
- Diagnostic Information and Procedures
- Repair Instructions
- Crankshaft Position System Variation Learn
- Throttle Learn
- Engine Control Module Replacement
- Engine Coolant Temperature Sensor Replacement
- Mass Airflow Sensor/Intake Air Temperature Sensor Replacement
- Manifold Absolute Pressure Sensor Replacement
- Heated Oxygen Sensor 1 Replacement
- Heated Oxygen Sensor 2 Replacement
- Accelerator Pedal Position Sensor Replacement
- Throttle Body Assembly Replacement
- Throttle Body Cleaning
- Fuel Pressure Relief (With CH 48027)
- Fuel Pressure Relief (Without CH 48027)
- Fuel Pressure Gage Installation and Removal
- Metal Collar Quick Connect Fitting Service
- Plastic Collar Quick Connect Fitting Service
- Fuel Tank Draining
- Fuel Tank Replacement
- Fuel Tank Pressure Sensor Replacement
- Fuel Level Sensor Replacement
- Fuel Pump Module Replacement
- Filler Tube Replacement
- Fuel Hose/Pipes Replacement - Chassis
- Fuel Feed Intermediate Pipe Replacement
- Fuel Tank Vent Pipe Replacement
- Fuel System Cleaning
- Fuel Injection Fuel Rail Assembly Replacement
- Fuel Injector Replacement
- Evaporative Emission Canister Purge Solenoid Valve Replacement
- Evaporative Emission Canister Vent Solenoid Valve Replacement
- Evaporative Emission Hoses/Pipes Replacement - Engine
- Evaporative Emission Hoses/Pipes Replacement - Engine/Chassis
- Evaporative Emission Canister Replacement
- Evaporative Emission System Cleaning
- Ignition Coil Replacement
- Spark Plug Inspection
- Spark Plug Replacement
- Crankshaft Position Sensor Replacement
- Camshaft Position Sensor Replacement - Intake
- Camshaft Position Sensor Replacement - Exhaust
- Camshaft Position Actuator Solenoid Valve Replacement
- Knock Sensor Replacement
- Air Cleaner Element Replacement
- Air Cleaner Assembly Replacement
- Air Cleaner Outlet Duct Replacement
- Description and Operation
- Engine Control Module Description
- Throttle Actuator Control (TAC) System Description
- Camshaft Actuator System Description
- Fuel System Description
- Fuel System Overview
- Fuel Tank
- Fuel Fill Pipe
- Fuel Filler Cap
- Fuel Pump Module
- Fuel Level Sensor
- Fuel Pump
- Fuel Strainer
- Fuel Pressure Regulator
- Fuel Feed Pipes
- Nylon Fuel Pipes
- Quick-Connect Fittings
- Fuel Rail Assembly
- Fuel Injectors
- Fuel Metering Modes of Operation
- Starting Mode
- Clear Flood Mode
- Run Mode
- Acceleration Mode
- Deceleration Mode
- Battery Voltage Correction Mode
- Fuel Cutoff Mode
- Fuel Trim
- Evaporative Emission Control System Description
- Electronic Ignition (EI) System Description
- Knock Sensor (KS) System Description
- Air Intake System Description
- Special Tools and Equipment
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When to See a Mechanic
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.