Engine no-start after cam/lifter replacement with all cylinders showing 5 psi compression, caused by intake valves being held open.

Standard diagnostic tools (compression tester, scope) can identify the symptom but not the root cause of intake valves being held open across all cylinders after a valvetrain rebuild.

Severity

4High

Willingness to Pay

implied

Added

May 20, 2026

Implied Software Gaps

Diagnostic tool that measures and compares intake valve closing timing across all cylinders to identify the root cause of low compression

App Concept

ValvePulse Pro

A diagnostic software tool that integrates with an engine scope to analyze valve timing events in real-time, detecting whether intake valves are being held open due to lifter preload, cam timing, or pushrod length. It guides the technician through a step-by-step process to isolate the exact cause, eliminating guesswork and repeated teardowns.

Key Features

Real-time valve event graphing using crank and cam sensor data
Automated pushrod length and lifter preload calculator based on valve lift measurements
Guided diagnostic tree for post-repair no-start issues
Integration with common scopes (Pico, Hantek) and OBD2 scan tools

Target Users: Independent automotive repair shop owners and DIY mechanics working on modern GM V8 engines with AFM/DOD systems

Revenue Model: $49/month subscription or $199 perpetual license with free updates for 1 year

Want to go deeper?

Sign up to save ideas, run AI analysis, and track opportunities in your personal workspace. Founding members get full access.

Join Beta

Solutions (0)

Discussion (0)

No comments yet