samsonhusky

i've got a plug with the ceramic on the outside with 2 cracks one on each side. The car has been running terrible could this one plug cause that much trouble. And what could have cause it to crackI changed my coolant before it started running bad would water getting on the plug crack it if the plug was hot.

Pearlkobra12

what did the ground strap look like.?

my77stang

1 bad plug = 1 bad cylinder, so yes, it can cause your car to run like crap.

usually they get cracked when your installing them, or they are cracked when you buy them from getting dropped or tossed around between the time they were manufactured and the time the goober at the auto parts store hands them to you.

i have had cracked plugs that i didnt even know were cracked until i misted water on them in the dark while the motor was running and saw the spark arcing from the center electrode to the hex part of the plug.

just replace the plug, hell replace them all just cause (autolite copper cores FTMFW) and you should be fine.

WhiteWindsor

Yes one bad plug will cause it too run poorly. The spark is not getting to the tip, it's just shooting out of the ceramic part. Like said above, mist it with water at night and you will see it. You may even find out that you need new wires as well as plugs.

aode08

or even worse

samsonhusky

Well I have about 15 miles on these plugs don't have insurance or tags on the car yet i just fire it up ever know and then and let it idle.I guessI must have cracked it when putting it in but it just started running bad hoping this is my trouble, changing it out today

samsonhusky

well that was my trouble that was a easy fix it

USMC1775

Good it was just that. Plugs are such an easy thing to change/fix, but such an integral part. My buddy just bought a 01 GT and it turns out his #4 plug was almost non-existant, as the plugs and coils were original after 60k [:'(]