The other day, i went WOT though 5 gears and when i came to a stop, my car started misfiring. It was cyl 3 misfire So i pulled the plug to find this plug beat to hell. LOL

Here is a picture but what can causethis. is it possible for that elctrode peice that broke off to still be in the cylinder. Im gonna send a magnet down the cylinder hole to see if it picks up any metal and then do a compressin test to make sure the walls aint ****ed up..

 

wow

 

how old are the plugs? how many miles are on them? it is possible detonation in that cylinder could have caused the grounding electrode to come off, or that one plug could have been defective from the manufacture. BTW that small electrode peice that came off probably bounced around the cyclinder chamber for a bit and then exited the exhaust valve. or it could be logged into the top of the piston. i tore down a small block ford a while back and when i pulled the cyclinder heads off i found a small screw imbedded in the head of the #7 piston. i appeared that it was there for a while and that engine never skipped a beat.

 

the plug has about 20k miles on it. its 1 step colder plug too. I thnk it was caused by detonation, other wise, no reason on why it shoulda broken off.

 

Dayum. That sucks, Dude.



What kind of plugs were they???

 

The NGK one step colder. I just ordered new plugs. I also put a magnet down there but couldnt catch nothing. Im kinda worried theres still something in the cylinder. Its too much work to pop the head off. Im gonna do a compression test tomorow to see what i pull. Hopefully and i pray to god, my wall is safe.

 

Odds are real good that the little piece of spark plug went out the exhaust valve . When part of my cyl. broke off , [ one inch piece ] it went out the exhaust valve . It was big enough to bend the valve though .

 

Is that plug from your old engine that blew? You have a new built engine right? Stop using the TN Reflash.... I usually change my spark plugs every 10K miles.

 

Can you post a picture of the rest of the plug, and how long you had been using it? If it was not a defective plug I would vote detonation/heat. Details on the setup and tune?

 

Please tell me this isnt from the brand new shortblock we sent you a couple months ago. Why are you putting 20K mile spark plugs into a brand new short block? But yes, that looks like a lot of heat/detonation.

Do a compression test ASAP, and drop some new plugs in there. Has the engine been fully tuned yet?

 

lol

 

dude i feel bad for you!!!!!!!!!! not because of the spark plug, but for the fact that you are about to be brow beatin by the top 350z tuners................i can just feel the ugly and mean looks comin through the monitor right now

 

dam that sucks...

 

Carnage.

 

EEEP
Surely OP didn't spend the $$ on a new motor and skimp on plugs?

 

I keep seeing this thread back at the top when I search "New Posts" and I want to say Yes, yes, it's due to detonation. You blew the plug up.

 

Unless he's racked up 20k miles in a few months. Because as I recall, his old engine had a bunch of bent rods, and so it wouldn't exactly be drivable. Unless I'm confusing him with someone else.

 

I guess I would look at it as job security.... motors can be bulletproof, but can they ever be idiot proof

 

man that is harsh!!!lol

 

its true you can't fix stupid