Marbles in a Can....
Not necessarily true. My Z used to detonate like crazy when it was just on a reflash that came with the turbo kit. The ECU never did anything or not enough to pull the timing.
How do you know it was detonation? Did you install knockbox or something similar to listen in on the knock sensor output? Like I said, audible detonation is severe and will likely cause engine damage in short order. Also a reflash can change both the high and low timing maps, so if it was really detonating, depending on the reflash, you might be correct in stating that the ecu could not compensate enough.
Might also have to dowith load. Depending on the fuel/timing maps andother related mods,sometimes detonation might only happen under certain load/rpm.
My Sentra had its timing advancedmany years ago. Lately I've noticed at a certain RPM, I am hearing pining but onceit goes higher, it stops.
I also asked if the sound was more accurately described as 'BBs in a can' instead of marbles. He said it sounds like BBs. It could be anything I guess but my guess is pinging.
My Sentra had its timing advancedmany years ago. Lately I've noticed at a certain RPM, I am hearing pining but onceit goes higher, it stops.
I also asked if the sound was more accurately described as 'BBs in a can' instead of marbles. He said it sounds like BBs. It could be anything I guess but my guess is pinging.
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Because this: "Ill change my assumption to BB's sound happens only in low RPM's when i gas it real quick. Its just for two seconds but clears up as soon as the rpms climb above 3K." is a dead accurate description of what my G sounded like with a lightweight flywheel. Have you ever driven a G or a Z with a lightweight fly? Perhaps his stock dual mass unit is getting tired and is not doing such a great job dampening anymore. I know mine doesn't dampen out the gear rattle as much as it used to, so sometimes I hear the "marbles in a can" very faintly when I lug the engine at ~1500-2000 rpm.
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MaRbLe
Body, Interior, Exterior & Lighting (DIY)
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May 16, 2011 08:25 AM
