k I just put a brand spanking new CV-X .15 In my nitro 4-tec, lots of compression, but I had a fuel delivery probelm, and may have been a little lean on break in, stil has lots of, not theres almost no compression, If i take the glow plug out and put it back in, i have lots of compression and the motor runs good, than when it shuts off, i have no compression, take the glowplug out put it back in, i have compression again.... Could it be the glowplug gasket, yeah i know just go buy a new glowplug with gasket but the hobby shop is 20+ Miles away and i want to go driving soon.... I've checked the head, back plate, and exhaust for tightness.... I am scared to death that i damaged my new little motor