just courious of anyone has any ideas why my two middle spart plugs are carbend up BIG TIME.

now i just bout the car it had been sittin for a wile year or so. i went to change the spark plugs and noticed the center spark plugs are black. so i changed them all and drove around for the day. this morning i check the spark plugs and again two middle ones are black. any ideas????

 

Bad piston rings? burning excessive oil? does it spit black smoke from the exhaust? any oil residue on the porcelain?

 

I am thinking if they aren't shiny(oily) then you may have a problem with the injectors leaking.
Quick test clean the plugs then swap the injectors to the outer cyl see if the black plug syndrome follows.
Remember to put a bit of engine oil on the o rings so the injectors slide in and don't wreck the o rings.

 

could i just use my old injectors from my CRX d16a6 injectors

 

depends what years your car and what motor you have

 

its a 1988 crx si with a SOHC ZC

 

Oh 1992 civic cx d15b7 i beleave

 

so i want to use d16 injectors in my d15

 

yea your two middle cylinders are running rich.. that sucks...

 

would my car throw a code if a injector is leaking or my car is running the way it is

 

well i think im in the same boat b/c all of my spark plugs are black, but their dry black. my friend said that it could be the o2 sensor, b/c i don't have my o2 sensor install, but do u get an idle or a rough idle...?

 

ya def. put the O2 in. and id check the grounds at the thermostat houseing make shure there not all nastied up. your car wount go into loop so your computer isent getting the info it needs to set your fuel and air ratio correct. so it is prob. dumping fuel just to stay running.

 

yup thats what my friend said so if i dont have a o2 sensor would my car be idling as well? or what do u think...?

 

nah it would prolly run like poop.

 

just woundering if my car would pop a code if i had a leaky injector

 

and also when i unplug the injector harness connectors two of them them make my car die. and the other two dont do anything at all just keeps on runnin