i have a miss fire in the 4 cylinder. i just changed my coil pack strip. i have changed my spark plugs and no change. still misfires. you can actual see it in the dark flashing because its that bad. please any suggestions would help but i cant think of anything please, anything would help.thank you

 

The crank sensor could be the problem and maybe put in some e3 plugs i did both in mine and the problem stoped i had multiple cylinder misfires

 

Where are you seeing the arc?

 

I didnt see a arc but take a look at all your grounds make sure they are good

 

Is it running bad?

 

the arc is sparking in the boot but i can see the flash from it

 

yea its just slow and sluggish and has an occasionally back fire

 

do you think its the fuel rail?

 

Take a good look at where the plug connects, compare to the other plugs. Something is wrong if you are getting an arc there. Not making good contact with the plug.

 

im gonna take it out tomorrow and check the gap and make sure it looks normal

 

Can't you take a closer look while its dark and see exactly the source of the spark/arc?
Why waste time looking elsewhere when you can SEE the source of your issue?

 

Is there a crack in the spark plug insulator? bet ya. Swap plug 4 & 5 (or pick your own number) see what happens.

 

...heat soak maybe i mean it is a 2000??

 

What does (fuel injector) heat soak have to do with coil/plug arcing?!

 

There is a spring inside rubber boot. Switch boot/spring and look at them. Is it oily? If spark goes through oil, it cooks it and makes it conduct electricity.