2002 Subaru Forester has intermittent rough idle, hesitation, surging, and misfire across all cylinders that worsens over time; the owner has replaced major ignition parts and checked for vacuum leaks but cannot diagnose the root cause.

Workarounds Described

• replaced multiple parts hoping to fix the issue
• used a smoke machine to check for vacuum leaks

Implied Software Gaps

• Software that diagnoses intermittent engine performance problems using live data and known failure patterns without requiring a professional-grade scan tool

DiagSnap Auto Pro

A cloud-connected OBD-II diagnostic app that records live sensor data and drives to pinpoint intermittent faults. It combines a simple Bluetooth adapter with an AI that analyzes waveform patterns and known-failure databases to tell you exactly which component to replace. No more swapping parts blindly.

Existing Solutions Mentioned