Diagnosing and eliminating a persistent carb backfire on a custom 350 engine after valvetrain repairs and ignition changes.

Workarounds Described

• uses timing light to adjust timing manually
• adjusts valves manually based on feel
• tweaks mixture screws by ear

Implied Software Gaps

• Automated ignition timing mapping tool that detects deviations from optimal advance curve
• Valve train diagnostics software that analyzes lifter preload and pushrod condition without disassembly
• Integrated carb mixture analyzer that recommends adjustments based on idle and transition readings

TimingTuner Pro

A smart diagnostic tool that connects to the ignition and engine sensors to analyze timing, valve events, and fuel mixture in real-time, pinpointing the root cause of backfire or misfire. It provides step-by-step troubleshooting guidance and visualizes live data on a mobile app, replacing guesswork with data-driven repair decisions.