Are the tips of the spark plugs supposed to be clean to the metal? My cars running like ****, missing at part throttle, but it seems to run good once I get past 3/4 throttle. I'm thinkin its my 02's since the computer doesnt use the 02's at WOT. And sometimes the 02's stop cyling for a couple minutes. Any ideas?

 

Are all your spark plugs that way?

 

I haven't had time to pull them all yet, I just pulled one. It still missing, I switched 02's, and reset the pcm and it started missing as soon as I started it up, so I'm guessing its mechanical, and not a sensor. I'm going to change all the plugs tomarrow and see how they look.

 

Well if its a true misfire then you can see it if you have a datalogger which Im assuming you do right?

Basically the instant you feel the mis, look at the O2 voltage. Sometimes its not very obvious where other times its very obvious. But what you look for is a lean spot in the reading and if you say they hang up or stop cycling then focus on that. If the voltage is .0xx mV when the sensor stops cycling then thats what bank your misfire is on... so you can narrow the search a little.

 

What kind of plugs were you useing and what are you replaceing them with.

 

I just have a scanmaster. When they stop moving, its both sides. They read between 917-921 basically, and sometimes they don't move for a minute or 2.

 

They are autolite 106's I'm probably just gonna replace them with 106's again.