4.0 OHV pinging under load
I have a '98 Ranger, it's nearing in on the 200K mark. A little over a year ago, I changed out the head gaskets and put on rebuilt heads. Other than a bit of oil consumption (even though it never used any before the heads....), the truck was running good. Beginning of winter, I noticed when I got the truck out on the highway, it would ping under load. Now that the weather has gotten warmer, it will always ping under load. It sounds pretty bad....
I've tried running injector cleaner and 93 Octane. There might have been a little bit of difference with 93 Octane, but it was minimal improvement.
Any ideas on what this could be? Should I try some Seafoam?
2012 Jeep Wrangler Unlimited
2003 Jeep Liberty Limited
Sold and missed......'98 Ranger XLT 2wd