How long do your plugs last
 

My last set went about 2000 miles. They were about 3 years old but only 2000 miles. I was out driving today and got a little stutter while cruising. The same indication that happened last time. These also have around 2000 miles and are about 2 years old. I have a Crane HI6 so I have plenty of fire power they just seem to go away. They seem OK on light acceleration (roads did not allow to really get on it. Just cruising I have a slight stutter. Off to the store for some plugs tomorrow.

Re: How long do your plugs last (Gordonm)
 

On my blown bigblock I am on the same plugs for 4 years and they still look good. Plug should not wear out that quickly. Properly jetted your plugs should still look new, Mine do after 4 years,

Re: How long do your plugs last (norvalwilhelm)
 

I have over 20k and about 2 years on mine and they are in fine condition. Lightly browned and hold a gap very well. That is definitely excessive wear. What exactly did the bad ones look like when you removed them the last time?

-Chris

Re: How long do your plugs last (Gordonm)
 

Do they look normal?

Take a look at "Reading Spark Plugs" with a web search and find some picturtes. Denso has a good bunch with reasons why they look the way they do.

Re: How long do your plugs last (triadecho)
 

My LT-1 is pretty radical and I have 10K miles on my Autolites but recently changed to A/C Rapidfires because I was feeling guilty about how long they have been in there. I have a Petronix Ignitor triggering a Accel 300+ digital ignition (like it much better than the MSD it is way less voltage sensitive than the MSD!) You need to have a proper idle mixture and lower end fuel curve for good plug life, it is possible!

Re: How long do your plugs last (Gordonm)
 

Try a hotter spark plug if everything else is ok. :cheers:

Re: How long do your plugs last (Ironcross)
 

Plugs look perfect. Looked good on the previous set also. I don't understand it. I'll have to check into more later when I get a chance.


[Modified by Gordonm, 6:12 PM 4/18/2004]

Re: How long do your plugs last (Gordonm)
 

Was not the plugs after all. Bad power valve was loading up at idle and to rich while cruising. Much better now.

Re: How long do your plugs last (Gordonm)
 

About 25,000 miles. Assuming a car is stock and does not have add-on do-dadds that do not really contribute to performance.