🚗 Classic Fault — Triumph CP/CR (1969–1976)
Triumph TR6 PI fuel injection hot start failure
💰 Estimated Repair Cost
$60 – $250 GBP
Parts and labour estimate
🔧 Tools Required
Lucas PI pressure gauge
📋 Overview
UK TR6s with Lucas PI fuel injection suffer hot restart failures due to vapour lock and fuel pressure loss.
🩺 Symptoms
- Engine will not restart when hot
- requires long cranking
- fine when cold
- fuel smell after shutdown
🔍 Possible Causes
- Vapour lock in Lucas PI system
- failed fuel pressure accumulator
- hot fuel pump
🛠️ Diagnosis Steps
Test fuel pressure — should hold residual pressure after shutdown. Accumulator failure is most common.
✅ Most Confirmed Fix
Fuel pressure accumulator replacement
80% of users confirm this fix worked (17 reports)
🔗 Other Triumph CP/CR Faults
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