🚗 Classic Fault — Volkswagen (1974–1983)
Golf Mk1 CIS injector seals leaking
💰 Estimated Repair Cost
$60 – $200 GBP
Parts and labour estimate
🔧 Tools Required
CIS pressure gauge set, injector puller
📋 Overview
K-Jetronic injectors drip fuel after shutdown, causing vapour lock hot starts and rich running.
🩺 Symptoms
- Hard hot start — fine when cold
- fuel smell after shutdown
- black sooty plugs
- rough idle when warm
🔍 Possible Causes
- Leaking injector pintle seals
- injector not holding opening pressure
- cracked injector body
🛠️ Diagnosis Steps
- Remove injectors and test with pressure gauge — should not drip below 2.5 bar
- replace O-rings and test again
✅ Most Confirmed Fix
Injector seal kit replacement or new injectors
75% of users confirm this fix worked (17 reports)
🩺 Related Symptoms
🔗 Other Volkswagen Faults
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