Engine Diagnostics Near Leesburg, FL
Plugging in a scan tool gives you a starting point, not an answer. RJ Fox Automotive uses professional-grade diagnostic equipment at our Eustis shop, about fifteen minutes from Leesburg via US-441 South, combined with hands-on testing to confirm what is actually wrong before anything gets replaced.
We pull all stored and pending fault codes, review freeze frame data, run live data analysis, perform compression testing where indicated, test fuel delivery and injector operation, check the ignition system, and do vacuum leak detection. You get a clear explanation of what we found and a written estimate before we start any repair.
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.
"Rob and co from start to finish with all of the obstacles was top shelf. I highly recommend fox automotive for anyone that is tired of the bs mechanics. Integrity and quality work!"
Paul Pelky Jr — Leesburg, FL