Thread: Chain noise?
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Old 11-12-2018, 07:54 PM   #20
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Join Date: Apr 2016
Location: SE Michigan
Posts: 363
Originally Posted by maytag View Post
Does it sound like 5 pebbles in a coffee can?

Cuz I hate to sound overly simple here, but the conditions you're describing are perfect for detonation. Sometimes referred to as "pinging", and correctly known as "pre- ignition".

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Interesting thought, it kind of sounds like it, and more from right side of the engine (but of course I’m sitting in the left side.) If so what causes it, bad knock sensors, lean mixture due to vacuum leak? It makes noise when the engine is cold or warm, and I use premium gas and different brand made no difference. MAF, all 4 O2 sensors and spark plugs are less than 15K-mile old, and no check engine lights/ codes...
1997 Boxster arctic silver/ red, XNE riveted mahogany/ leather steering wheel & 917-style wood shift knob, Benís short shifter, PSE, 996 TB, UDP, stereo/ center console delete, daily driven shine or snow.

Last edited by Boxstard; 11-12-2018 at 07:57 PM.
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