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23:26:30 - 12/19/2024
V6 Dakotas
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watkinstick
Dodge Dakota
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2/18/2004
15:43:25
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 Subject: What is pinging?
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Message:
I hear a lot of people talk about it, but i am not sure what it is. Could some one help me out on this one please? Thanks!
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Answer
Dodge Dakota
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2/18/2004
16:06:20
| RE: What is pinging?
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Message:
Ping is preignition. It sounds like a rattling sound coming from the engine. You'll hear it when you mash the pedal.
Instead of the air fuel mixture igniting by the spark plug, the mixture ignites from a heat source in the cylinder. This could be glowing carbon, glowing sparkplugs, glowing valves or a lean mixture or too much compression or a combination of any of those.
Ping literally hammers the top of the piston and kills power. Instead of the mixture burning at a controlled rate overa few milliseconds (approx. 20 degrees of crankshaft rotation) it detonates spontaneously, like a bomb.
Severe preignition can break pistons, con rods, hammer the snot out of bearings and journals. A lean ping can melt pistons very fast. Severe ping could be a sign a burned valves and vice versa.
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