dwana wrote:
> Hello:
>
> I've recently noticed some pinging in my car at low RPM (less than 2000). I
> don't hear anything at RPM above 3000. I checked all the plugs, plug wires,
> timing and everything looks OK. I recently changed to BOSCH plugs instead
> of NGK.
>
> Anyone have any ideas on likely causes of pinging? Thanks.
>
> PK
>
>

It is possible that the Bosch plugs have hotter hot spots than the NGKs
did. This is only a 50/50 thing, but since the symptoms showed up after
the change I would start by retracing my steps and putting plugs which
exactly match your prior NBKs.

John