HPI 3.0 Engine
This engine is in an RS4 Drift, trying to get it sorted for a mate;
Car is new, currently on run-in, has had 5 tanks put through. However will not run properly unless pressure line is disconnected from fuel tank. Removed, it will idle and run just fine. When fitted to tank, rpm's slowly increase until engine stalls around 30 seconds later. Remove line, starts and runs fine again.
Needles are at factory settings, plug is LRP medium, fuel is Nitro X 20%, with 15% oil (5% castor 10% synthetic).
Have already checked and eliminated fuel tank and lines, glow plug and fuel. Have also checked tension on head bolts and backplate bolts.
Suggestions?