I ordered them earlier today, thanks.

 

what are you mods..the same thing happened to me except it was a Z06, anywho it ended up being my Buschur COP ignition, took that crap off and went to stock, car runs like a champ.

 

While you have the plugs out why not run a compression test it's a 5 minute job.

 

Cams, mbc, intake, tbe, uicp and utec. Those are the ones that matter.

 

Plugs changed, one was broken. Now what?

 

Looks like pre-ignition.

Do compression first. If okay then change the fuel injector and knock sensor. If not okay you need engine work.

 

blown engine.

 

Where is the other "missing piece"? did it blow out the head, thru the turbo? How did it break? Piston hit it? I would look down there, and see what the piston looks like.

 

Its not broke, its tipped (burnt)....this happens a lot with high hp n2o kits....car ran lean and burned tip of plug off. If compression and leak down are ok install new plugs, re-tune, and count yourself lucky

 

Who said anything about n2o? What did the compression test show?

 

lol everyone is saying the same thing, so go get a compression test and tell us how that came out.

 

Yeah, I haven't had a chance to do a compression test yet, I work a lot on the weekends so hopefully I can do it today or tomorrow.

 

UPDATE

Compression test is done. Three were around 170 the one in question was 120.

So what am I looking at?

 

you more then likely scrapped up the cylnder wall with the little pieces of porcline from the plug. hopefully when it passed through your engine it didn't do too much damage to your turbine wheel either.

Technically you should tear the engine down, inspect everything including the turbo, hone the cylinders, and replace the rings. But in theory you 'could' drive it for another 100k and not have anyother problems except for less performance.

 

So I would guess I should take it to a professional and have them check it out. This really sucks.