Explorer 98' engine Pinging

My 94 had pinging problems that were treated with all the remedies
mentioned so far. Finally, I replaced the fuel pressure regulator. Seems
the old one only worked under normal, flatland loads. Get the model by
GP Sorenson Co.; the others do not physically fit like they are supposed
to. About $75.00 @ Autozone. Don't even ask what Ford wants for one!

dosio wrote:
> Hi guys,
>
> I own an Explorer with 4.0 OVH or "pushrod engine" When I bought it, even up
> hill under load engine was very quiet. Recently I notice under same
> conditions , pinging sound start to come out from the engine. I understand
> it's not good if it happened for prolong time but with distributor less
> model , What to do to minimize or get rid of it?
>
> I switched fuel with Texaco, change plugs and cables but sound still
> exised.
>
> What else do I need to do to improve?
>
> Please help any ideas will be appreciated
>
> Dosio
>
>