****ing plugs black and burnt

[JerryDaugherty]

car runs like **** bottom line number 4 and number 8 plugs are charcoal the rest are white... brand new motorcraft plugs... wtf why just the 2 back cylinders... and i got these plugs they were stock replacement... but i have edle rpms wut plugs do i need and why are only 2 black

 

[txstang84]

I run Autolite 3924's...they seem to work fine...

do you have a couple of leaky injectors? or maybe burning oil?

 

[JerryDaugherty]

yea i think i do have leaky injectors.. but no fuel comes out just when i prime the car i can hear a lil gasp of air come out... but oddly enough the FP stays at 38 how could a leaky injector cause the charcoal on #4 and #8?

 

[txstang84]

if they are indeed leaking, they'll run the cylinders really rich, thus giving you the soot...where do you hear the "gasp" of air coming from, that could be a bit of a problem..

 

[JerryDaugherty]

well it isnt sucking the air it is like pushing it idk gasp came to mine but it is comming from the areas of the fuel rail and like swooshing air

 

[JerryDaugherty]

anyone else have anything to add?