TeamPontiac79 12 Report post Posted February 22, 2015 Hey folks, I believe I have a burnt exhaust valve on the driver's side of my 302. It's a bone stock original with 72k miles. Only thing changed internally was the timing chain. I am on the road far from home, and don't have compression/vacuum gauges available. The problem has been persistent from beforw I left, but getting worse. The ignition components are new or verified (new plugs, wires, cap, rotor, recent points/condensor, original coil). The engine has a pretty regular miss when decelerating, cruising, or accelerating lightly. It seems to go away while I accelerate spiritedly or hammer it, so under a heavy load no vacuum condition is when I don't notice it. It's also less noticeable at idle, but definitely still there. I'm also getting the characteristic popping at the tailpipe, and a piece of paper placed at the pipe shows it is actually a momentary sucking. Car has dual exhaust, and it's only doing it on the left. Is there anything other than a burnt exhaust valve that can create this condition? I'm thinking not, but wanted to toss it around here before putting a major engine service on the to-do list. 1 Ronaldbaf reacted to this Quote Share this post Link to post Share on other sites
Rsanter 152 Report post Posted February 22, 2015 You say you are on the road? Where? Perhaps there is a member nearby that will help Bob Quote Share this post Link to post Share on other sites
TeamPontiac79 12 Report post Posted February 22, 2015 Currently I'm in Key Largo through tomorrow, maybe longer. Headed back to frozen Philadelphia PA later in the week. Quote Share this post Link to post Share on other sites
1969vert 55 Report post Posted February 22, 2015 Need to do a leak down and compression test to be sure....but I did have a rocker stud start to pull out of the head on a 1970 mustang one time...was doing the same thing..easy temporary fix...beat it back down with a hammer...good luck... Quote Share this post Link to post Share on other sites
