what does pinging and knocking mean?
what does pinging and knocking mean?
03-01-2004, 08:58 PM
#2
Registered User
Join Date: Aug 2003
Location: richmond,va
Posts: 68
Car Info: 04 wrx sti
detenation or spark knock/ can come from a few diffrent things such as carbon build-up on the surface of a piston. the carbon deposits can absorb heat and actually ignite the air/fuel mixture long before the spark plug ever fires.
03-02-2004, 01:27 AM
#3
Registered User
iTrader: (12)
Join Date: Nov 2002
Location: Reno, NV
Posts: 18,369
Car Info: 1993/2000/2001 GF4 mostly red
"Ping" or "knock" refers to detonation. Detonation is the term for the air/fuel mixture igniting prematurely due to heat and pressure rather than from the electrical spark. When this happens, your engine internals are subjected to MUCH higher forces than from 'proper' combustion. Detonation is almost always what causes catastrophic engine failure (oil starvation is #2). It is called 'knock' or 'ping' because that is what it sounds like when you hear it.
Thread
Thread Starter
Forum
Replies
Last Post
salvator_rizzo
Engine/Power - non turbo (All non turbo Imprezas)
1
07-20-2010 08:51 PM
in3g_wrx
Engine/Power - EJ20T (pre-2006 WRX and JDM)
4
06-02-2003 10:28 AM
