Stuck Valve Indication?
Recently tuned up the small block in my 66 and installed new exhaust. I now have a popping sound that is similiar to a back fire. Car ran fine initally then the popping started and engine has become sluggish. At 40 MPH and above if i take my foot off accelarator the decompression increases the popping sound to a almost back fire. At idle it just pops. No knocking from underneath hence the thought maybe a stuck valve. Any suggestions on how to determine if a valve is stuck would be helpful.
Last edited by lndbarron; 08-19-2019 at 06:50 PM.