Hi I have a 240SX with 150000 miles in it. I just recently changed the water pump, thermostat, radiator hoses, belts, spark plugs, wires, distributor cap and rotor, fuel filter and o2 sensor and now I have this misfiring problem. When I first started driving the car with all this new stuff, the car was running pretty good then a day later the car started to misfire. The car runs fine below 3000 RPM when cold and when the engine is warm the engine starts to misfire at any random RPMS. So I removed the spark plugs and they were all burnt up with white dust on them and for some reason the electrodes on the spark were bent and broken. So what could possibly make this problem? any help please? By the way I tried NGK & Autolite XP Spark Plugs. Please someone help me. I need my car for school and commuting. Thanks.

ok here are the pictures.


Note: These both sets were brand new NGKs today and when I drove it to school I removed them and thankfully I had a set with me so I replaced them overthere and when I was on my way back home it started misfiring again and when I pulled them out they came out burnt and regapped and the car sounds fine and runs really good when they are brand new why does it do that?
I can't figure it out.

http://i71.photobucket.com/albums/i135/puerkone/Timing.jpg

Is my timing ok to be all the way to the left on the distribuitor?

I just put these new spark plugs today and when it misfired today now they look burnt whats going on its like the plugs are running too lean or what? please help me. NGK Spark Plugs. Both sets of plugs gave up on the same day

http://i71.photobucket.com/albums/i135/puerkone/sparkplug4.jpg
Cylinder 4

http://i71.photobucket.com/albums/i135/puerkone/sparkplug3.jpg
Cylinder 3

http://i71.photobucket.com/albums/i135/puerkone/sparkplug2.jpg
Cylinder 2

http://i71.photobucket.com/albums/i135/puerkone/sparkplug1.jpg
Cylinder 1

http://i71.photobucket.com/albums/i135/puerkone/2ndset.jpg
Burnt Sparkplugs

the set before I put these plugs were worse they were burnt and broken

http://i71.photobucket.com/albums/i135/puerkone/Burntsparkplugs1stsetall.jpg

http://i71.photobucket.com/albums/i135/puerkone/Burntsparkplugs1stset.jpg

Same thing they were burnt any help? I gap them all at .044 and when i pull them out the gap changes below .020 why does it regap by itself? help!!!