Engine Diagnostics Near Tavares, FL
A check engine light or a symptom you cannot quite describe is not enough information to start replacing parts. RJ Fox Automotive uses professional-grade diagnostic equipment at our Eustis shop, about ten minutes from Tavares via US-441 or SR-19 South.
We scan all fault codes across every module, review freeze frame data, and perform the hands-on testing needed to confirm the root cause. Beyond code retrieval, we perform live data analysis, compression testing, fuel pressure and injector testing, ignition system testing, and vacuum leak detection.
Engine Diagnostic Services We Perform
OBD-II Fault Code Retrieval
Reading all stored and pending fault codes from the engine control module along with freeze frame data.
Live Data Analysis
Monitoring sensor outputs, fuel trims, oxygen sensor behavior, and other parameters in real time while the engine runs.
Compression Testing
Measuring compression in each cylinder to assess the mechanical health of rings, valves, and head gasket.
Leak-Down Testing
Pressurizing each cylinder to identify where compression is being lost and confirm the cause.
Fuel System Testing
Testing fuel pressure, injector operation, and fuel delivery volume to rule out fuel system faults.
Ignition System Testing
Testing spark output, coil-on-plug performance, and secondary ignition circuit integrity.
Vacuum Leak Detection
Using smoke or propane to find air entering the intake system downstream of the mass airflow sensor.
Cooling System Pressure Test
Pressure testing the cooling system to identify leaks and performing a combustion gas test when head gasket failure is suspected.
"RJ not only completed repairs and communicated with me throughout the job but got it done before he said he would. All around fantastic experience and top class workmanship."
Eric Estell — Tavares, FL