I have a spark plug that is stripped in the cylinder head, and it makes a valve ticking noise. so I'm going to replace the valve head. It smokes like crazy.(bluish, white). But I was driving the other day, and my car started to hesitate while driving pretty bad, so I pulled over, and my spark plug was shot out of the head. I got the car towed home, and yesterday, I put the spark plug back in just enough to where it was tight to where it would stay in there. and I started it up, and it was fine, but there was a lot of smoke coming out of the exhaust for at least 5 minutes, and a little from the engine. So I drove the car around the block and halfway around, my rpm's dropped and I heard a weird clunk noise from the engine, and so i mostly idled the rest of the way home, and the rpms would drop below 500 and my car felt like it was about do die, then I gave it gas, and the rpm's raised but didn't really do much for acceleration, and it was very sluggish, like my trans was going out, but it's not the trans. I got home, and the sparkplug was still in the cylinder. I dont think this problem could be caused by a loose sparkplug. any help on what this could be?

 

if that plugs not making good enough contact to the head then its not grounded and wont fire.

instead of spending a small fortune on replacing the head, try a helicoil and get that plug firmly threaded in again.

Id start there as a missfire will make the car run like a bag of crap.

the blueish smoke could just be leaking past the plug and getting into combustion chamber, it;s the white smoke that concerns me, thats a sign of burning water(not good)

 

whats a helicoil? and I drove before when the spark plug popped out, and there was just a very loud ticking sound, but yesterday was a lot different, It was like jerking back and forth, and I just dont know if it's a gasket or what.

 

when the plug popped out there will be no pressure in that cylinder(engine wont feel it)

whats a helicoil?
http://en.wikipedia.org/wiki/Threaded_insert

might be a lil over ur head I dunno