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13 GHOST wrote:What is pre-detonation is it same as detonation
ase_tt wrote:i have a ford focus mk2 that pings and runs on premium, only mod i have is a cone filter the metal kind.... any advise where to begin looking...
What i noticed is after an oil change and new plugs...car runs great for about a week, and then its back to the pinking/pinging
Chaim wrote:Hello everyone.
I'm new to the Trini forums...
but usually you won't even hear the knock.
X2 wrote:Chaim wrote:Hello everyone.
I'm new to the Trini forums...
but usually you won't even hear the knock.
For the most part that is true.. with all the sound deadening in the car cabin plus how densely packed the engine bay is, often you won't hear it... but the loud stuff you can hear when listening for it... if it's loud enough to hear... it's knocking/pinging pretty badly.
Serious enthusiasts and tuners may take the time to make a 'Det-can'... basically a DIY detonation hearing device that allows you to use it like a stethoscope to listen to the engine.
Regarding the ford... they tend to ping... use an octane booster to increase octane... I suspect the timing maps are a bit aggressive (ignition timing)... which will keep the combustion chamber hot enough to encourage pinging or rattling. My Focus did it for years...even slightly so on premium.
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