Discussion Starter · #1 ·
I am having a pretty annoying problem with my 6M-GTE. everything is fine until the boost goes above 5psi and then it sounds like a rattling noise coming from my engine. it doesn't sound like detonation. I have had that happen before. I dont really know how to explain it. it almost sounds like something is loose. but the engine never makes noise in everyday driving out of boost. I drive this car 90+ miles a day and it runs great as long as I dont step on it. I have played with the fuel a bit (only richer of course). and I have retarded the timing down to 4 degrees. and still no change. the engine runs cool, no loss of coolant, some loss of oil due to leaking and rings starting to have blowby under boost. but other then that the car doesnt smoke or run harshly at all. this totally has my mind boggled.