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Juggernaut
Irreverent or irrelevant?
Premium
join:2006-09-05
Kelowna, BC
kudos:2
reply to matt5

Re: [Tech] Which grade of fuel should I use

said by matt5:

If you are having issues with pinging, you likely have other issues, and should get them looked at asap as pinging will destroy the motor in a short time.

I would agree. This car shouldn't knock on regular. It sounds like the ECM is putting out bad timing curves. It was suggested it may have a lot of deposits, but it would have to have a lot of blow-by from the rings or valves generally speaking.

One thing the op can do is pull a middle plug, and check for pre-ignition damage to it. It'll look melted/ corroded.

Is the engine running hotter than normal? That's also a sign...