Car’s RPM fluctuates and engine stalls when warm, especially with AC on, causing dangerous shutdowns while coasting.

No affordable, user-friendly diagnostic tool for DIY car owners to identify intermittent warm-engine stalling issues without professional mechanic visit.

Severity

4High

Willingness to Pay

implied

Added

May 8, 2026

Implied Software Gaps

Diagnostic tool that simulates warm-engine and AC-on conditions to reproduce intermittent stalling, with step-by-step troubleshooting instructions

App Concept

AutoScan DIY

AutoScan DIY is a mobile app paired with a Bluetooth OBD-II scanner that diagnoses intermittent engine problems like warm-idle stalls and RPM fluctuations. It runs guided tests (e.g., with AC on) and provides clear, actionable results with repair tips, saving users costly mechanic visits.

Key Features

Warm-engine stalling test mode with AC load simulation
Real-time live data graphing for RPM, throttle position, and temperature
Smart diagnostic report with probable causes and DIY fix steps
Cloud-based community troubleshooting database

Target Users: DIY car enthusiasts and owners of older European vehicles (BMW, Audi, Mercedes) with intermittent engine issues

Revenue Model: Freemium app with $29.99/year subscription for advanced diagnostics and cloud reporting

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