Zafar Ahmed
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Hey guys. The search option was not helpful. Looking for advice.
How to perform a boost leak test on a stock 4EFTE?
- Thread starter Zafar Ahmed
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- boost boost creep boost leak
WhiteOverGoldMK1GT
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i Hope to sweet jesus you dont have many Vac lines.
if your idle is wild ( up and down etc ) get a somewhat flammable substance, WD-40 can work, brake cleaner works too. and use that to locate your leak, be careful as its flammable AF.
OR use soap and water in a spray bottle ( less safe for engine, but good on intercooler joiners etc )
OR go OCD and locate every single point on the engine that connects to a vac line. check them all. Even the brake booster. make sure every one is put on tight, with at Least zip ties, or those metal binders.
Zafar Ahmed
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I'll give it a go. Thanks bud
Zafar Ahmed
Member +
Do I connect the smoke machine to the EFI pipe?A smoke machine will tell you easy enough, try a few local garages to see if it's a service they offer
For a vacuum leak he needs to put it on the manifold side of the throttle body and for a boost leak on the other sideYou can connect it to various pipes Bud
Works more effectively this way.
Do you see low boost on your boost gauge?
Zafar Ahmed
Member +
Sure did. Now all fixed. Found 15 different leaks lol. However, I have HKS actuator with 2 turn preload. Spools great but getting fuel cut. The boost keeps on creeping. Even with no preload, spools late but creeps to fuel cut on 3rd. Any pointers?
Could be a badly cracked waste gate seat inside the turbo?
Zafar Ahmed
Member +
You're correct. Well it was not badly cracked. Just a hairline. Barely noticeable until I looked closely with flashlight. What solved the problem was I ported it around 3mm more. Decat gasket was causing problems too. Got it all sorted and now boosting 12.5psi and no fuel cut