Help! Changed plugs due to a miss, now experiencing white dust like smoke out of both exhausts, what could it be? Still has a miss. Everything is plugged in and tightened up. Nissan 350z 2008. Looks like fine metal shaving, how could that be coming out of exhaust?

 

it could be...bad news

prepare yourself to have the engine replaced..

metal shavings =\ good

 

why did you post this in the NO thread?

 

Bc race car, obviously.
"HALP"

 

Coolant? does it smell sweet?

 

Any luck?? Same thing happened to me, changed spark plugs and a coil pack because of misfiring and I started up my car and it shot out what looks like metal shavings, after a 5 min drive I looked down into my bay because there was a significant decrease in power and my catalytic converters was RED hot. Guessing I should pull the cats?

 

Probably the catalytic convert material. Pull the cats they are probably blocked with there own material. Don't put new ones in until you fix the misfire you'll just destroy the new cats.

 

Codes?