camaro 1999

i was at the track and i made a nitrous pass and the car backfire going threw the traps i took the car home and i seen there were two spark plugs that the tips were burn on i change all the plugs and the car is still missing when i start the car up what is wrong with it any one have any suggestion

jetlag

iTrader: (32)

When my car was backfiring it was dangerously lean, but you said the plugs were burnt so I assume you mean too rich? I think the car can misfire when its too rich????

ShiznityZ28

iTrader: (11)

What plugs? what timming? what AF etc.... need morei nfo. got a pic of the plugs?

GoldRust

iTrader: (2)

I would bet that you broke a piston. Start the car, pull off the oil cap and see if it is puffing out the filler neck.

02SOMWS6

iTrader: (6)

I say he burnt a valve. When I burnt a valve I had 3 plugs that the tips were melted.6,8,and 7 were melted.If your lucky you only burnt a valve and your rings are fine. You should have the car tuned for spray next time around.

ShiznityZ28

iTrader: (11)

put air in the cyl and see where the noise is. Pul the new plugs out and see which ones are not popping off.

BAKED

iTrader: (14)

That's what My guess is too.

camaro 1999

burnt valve it was thanks for the help

02SOMWS6

iTrader: (6)

thought that would be it. Been there, broke that.You might want to do a leak-down test & a compression test. I mine tested o.k with the leak down test so I put it back together. Seems now that I should have threw a set of rings in it.My compression readings are all over the place from as low as 170 to as high as 210. They should all be 210. I'm still making good power but it could be more. Make sure you get a timing tuner to retard your timing when your spray is on or have it tuned for spray so it dosent happen again.