Get some better plugs! Mine used to ping like a banshee. Until I put some
Denso iridium's in her. Now she shits and gets with not the slightest hint of
detonation or pre-ignition.
Chris
01 QC 4.7 4x4
Robert Schultz wrote:
> Since I got this truck in May 2000, the engine has been somewhat loud during
> load or hard acceleration. From the descriptions of pinging on the 5.2 and
> 5.9, it sounds suspiciously like what I've been hearing under the hood with
> the 4.7.
>
> So the other day I broke the bank and bought 89 octane gas. Seems to me that
> the engine runs a lot smoother and there's less 'knock' or ping during hard
> acceleration. And it certainly seems to rev easier.
>
> Has anyone else experienced this?
>
> What would be the possible solutions (other than expensive higher octane
> gas)?
>
> Now I do buy 90% of my gas at Pionerr Petroleum (an independent here in
> southern Ontario), but I've never noticed any difference using any other
> gas.
>
> Rob S.
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