ok here is my story last week i got my car dyno tunned at one of my local shops, every thing was great i was putting a 170 ponies to the grown but later that night i was driving around and one of my bypass hose took a shit on me and blew so the next morning i got all the right things to fix it so i was on my to drive to sac. which is about 1 1/2 away and when i was driving there i was doing about 80 with no one in front of me and the temp gauge starts to rise im like WTF so i slow down and it starts to drop slowy so get to sac and im driving around town just fine the temp gauge is right where its suppost to be. so then i was on my way home again do 80 with no one in front of me and the temp gauge is riseing agian but i do make it home with out over heating. so today im driving around and my buddy is in the car behind me and tells me there is this white smoke coming out of the exhust. which means that my head gasket is gone and also to day the car was running funny so i pulled all the plugs out cly. 1 is running really lean ackording to the plug but cly.2 3 and 4 are just fine and my check engine light kept coming on and off is Cly. 1 not getting enought fuel due to the injector and that is why the engine light is come on or is the head gasket leaking only in cly. 1 bad. and i also hear this slight knock when the rpms are around 3k to 5k . and am i over heating due to the head leacking any idea im lost as can be thanks devin