🚗 Classic Fault — Toyota (1983–1987)
AE86 3A-GE TVIS vacuum line cracking
💰 Estimated Repair Cost
$5 – $25 GBP
Parts and labour estimate
🔧 Tools Required
Carb cleaner, vacuum line kit
📋 Overview
The small rubber vacuum lines operating the T-VIS system crack with age, causing vacuum leaks and idle problems.
🩺 Symptoms
- Rough idle
- hunting idle
- T-VIS not operating correctly
- intake hiss at idle
🔍 Possible Causes
- Cracked vacuum lines
- failed T-VIS solenoid
- blocked vacuum ports
🛠️ Diagnosis Steps
With engine running, spray carb cleaner around vacuum lines — idle change indicates a leak
✅ Most Confirmed Fix
Vacuum line replacement
91% of users confirm this fix worked (29 reports)
🩺 Related Symptoms
🔗 Other Toyota Faults
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