engine ping then knock on 1995 Chevrolet 1500 Pickup

my tuck pings then turns to a small knock until you give it more gas i have put in a knock sensor it helped for around 20 miles

by in Lyndhurst, VA on January 10, 2010
1 answer 1 comment
ANSWER by on January 10, 2010
The pinging may be from a bad EGR valve. Any Check Engine or Service Engine Soon Light coming on? I assume that your timing is on the money and that your truck is not over heating. Check out this Article, the CEL is about a problem, not maintenance. http://repairpal.com/check-engine-light
COMMENT by on February 09, 2013
If the truck is heating up not over heating at highway speed is that a different problem? I have the ping as well