Unable to diagnose excessive crankcase pressure after carburetor swap on a 1986 Honda Accord, causing oil spray and poor engine performance.

No purpose-built diagnostic tool exists that guides DIY mechanics through post-modification engine issues like crankcase pressure; they rely on forums and guesswork.

Severity

4High

Willingness to Pay

implied

Added

May 14, 2026

Implied Software Gaps

Diagnostic app that guides testing of PCV valve and vacuum line connections for modified engines

App Concept

CarbSwap Diagnostic Wizard

An app that helps car enthusiasts diagnose and solve engine problems after carburetor swaps or other modifications. It provides step-by-step troubleshooting based on symptoms, suggests likely causes (e.g., clogged PCV, vacuum leaks), and guides users through fixes with diagrams and videos.

Key Features

Symptom-based troubleshooting tree for carb swap issues
Interactive diagrams of vacuum lines and PCV systems
Guided tests (e.g., crankcase pressure measurement)
Community-vetted fix repository for common swap errors

Target Users: DIY car enthusiasts and mechanics working on 1980s-1990s Japanese cars, particularly those performing carburetor swaps.

Revenue Model: $4.99 one-time purchase per vehicle guide or $9.99/month subscription for access to all guides and community support.

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