Engine Diagnostics & Repair

At Unitech Auto Repair & Smog, Inc., we provide comprehensive engine diagnostics and repair services using advanced technology and proven techniques. Our ASE-certified technicians are specially trained to diagnose and resolve complex engine issues for all makes and models in the Sacramento area.

Our Engine Diagnostics & Repair Services Include:

• Comprehensive Engine Diagnostics: Using manufacturer-specific diagnostic equipment and advanced scan tools, our ASE-certified technicians perform thorough engine analysis that goes beyond basic code reading. We analyze live data streams, conduct performance tests, and utilize thermal imaging to identify the root cause of engine problems – essential for Sacramento drivers who need reliable transportation in our region's hot summers and occasional winter fog.
• Check Engine Light Diagnosis: Our systematic approach to check engine light diagnosis combines computer scanning with hands-on testing to accurately identify issues from simple gas cap problems to complex emissions system failures. Sacramento drivers appreciate our clear explanations of diagnostic findings and straightforward repair recommendations that keep your vehicle compliant with California's strict emissions standards.
• Misfire & Idle Issue Troubleshooting: Engine misfires and rough idle problems can have multiple causes from ignition issues to fuel delivery problems. Our technicians use cylinder contribution tests, fuel pressure analysis, and ignition system diagnostics to pinpoint the exact cause, saving Sacramento drivers from unnecessary parts replacement and ensuring smooth, efficient engine operation in all driving conditions.
• Sensor & Module Testing: Modern vehicles rely on dozens of sensors and electronic modules to operate efficiently. We use advanced testing equipment to verify sensor operation, signal quality, and module communication, ensuring your vehicle's computer systems receive accurate information – critical for optimal performance and fuel economy during Sacramento commutes.
• Spark Plug Replacement: We install OEM-recommended or premium iridium/platinum spark plugs precisely gapped and torqued to manufacturer specifications. Our technicians also inspect ignition coils, wires, and boots during service, ensuring complete combustion efficiency and maximum power – particularly important for Sacramento's varying driving conditions from city streets to highway travel.
• Fuel System Cleaning: Sacramento's seasonal temperature changes and fuel quality variations can lead to carbon buildup and injector deposits. Our professional-grade fuel system cleaning services restore proper spray patterns, remove intake valve deposits, and clean combustion chambers, improving fuel economy, reducing emissions, and restoring lost power and performance.
• Compression Testing: Our detailed compression and leak-down testing identifies internal engine problems including worn rings, leaking valves, and head gasket issues. This critical diagnostic service helps Sacramento drivers make informed decisions about engine repairs versus replacement, potentially saving thousands on unnecessary work.
• Engine Performance Tune-Up: Our comprehensive tune-up service combines multiple maintenance procedures including spark plug replacement, fuel system cleaning, throttle body service, air filter replacement, and computer system updates. This complete service restores lost performance, improves fuel economy, and extends engine life – perfect for Sacramento drivers looking to maximize their vehicle's efficiency and reliability.