11-11-2012, 09:40 PM
1. Check the vacuum pump and lines, especially the one from the pump to the master cylinder. If that's not performing properly when cold it could cause extra strain on the engine when the brakes are pressed.
2. Check for pinhole boost leaks. I get a whistle off mine at a certain psi, appears to be the threshold of a dodgy hose that burst open at certain pressure. Builds boost fine up to and past that point but air whistle out of it under pressure.
2. Check for pinhole boost leaks. I get a whistle off mine at a certain psi, appears to be the threshold of a dodgy hose that burst open at certain pressure. Builds boost fine up to and past that point but air whistle out of it under pressure.
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