201615 - Call 06
Stephan’s truck knocks and pings like crazy. He took it to his mechanic who poured water down the carburetor while revving the engine. The knocking went away for about a month, but was this okay for the engine? Tom and Ray say it’s fine--water is often used to break up carbon deposits. But Stephan should get the problem fixed--could be timing or the EGR valve. The pinging will get even worse in the summer.