Misfire

[2007todd]

Ok guys, can't find any threads on this specific of misfire issue. I changed my plugs approximately 3 months ago in my 2007 gt. This was after i had a misfire on cylinder 7 code and changed the coil pack first. Everything was good until the last few weeks, started missing and upon acceleration, would feel like it was sputtering, but have gotten no cel or codes. I pulled the plugs this morning and all look pretty good, except for cylinder 7. I went and got new plug and changed it and took it out for a drive, feels pretty good, i just may be paranoid at this point, but sometimes still feels like it is there. Just wondering why the plug looks this bad and no cel. Thanks in advance, Todd

 

[racerraj]

Something is really wrong for it to eat the metal of the plug away. I'd pull the new plug out after a couple hundred miles and check it.

 

[38stang]

That looks like over heating and detonation. Is your car stock or boosted.

 

[2007todd]

car is stock except for headers and x-pipe. maybe bad injector? still no codes

 

[38stang]

car is stock except for headers and x-pipe. maybe bad injector? still no codes

A bad injector is a possibility.

 

[Bullitt95]

Have you been using any fuel additives?

 

[38stang]

Have you been using any fuel additives?

If it was additives it would affect more than one cylinder.