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