what is the gapping for spark plugs on a 99 4runner

 

did you try to even search for this?

 

ya but i heard that it was not all .044 I heard that some of the cylinders would be different.

 

HUH?? Some of the cylinders are different? First I've ever heard of that.

You're right about the gap being .044. But, if you're using OEM NGK's or Denso's, they have the dual electrodes and the gap is preset from the factory. Gaping the plugs is not necessary or recommended.

 

If you gap them you will ruin them. The arc between each ground has to be exactly the same. If you gap them, it will only create a spark between one ground and the electrode instead of between both grounds and the electrode. It will be like running normal spark plugs.

 

i have ngk iridium ones from shucks

 

There will NEVER be spark from both. It will be one OR the other. The advantage to two is it takes twice as long for them to wear as the spark will switch electrodes.

 

I've never heard to not gap them before. I had to on the set of NGK's I got. The were not at.044

Which is it?

 

Your not suppose to gap platinum or iridium plugs because it will ruin the platinum coating on the tip of the plug. I know for iridium plugs you don't need to gap them because they come pregapped and if you do gap them you also might damage the iridium tip. Also you don't need to service Iridium plugs for 5 years.

 

Well, I guess my knowledge of physics failed me today.....
Thanks for the info.

BTW, I will always play it safe and use OEM spark plugs and nothing else and if I take out the spark plugs to service the engine and put them back in, I always put them in the same cylinder.

 

Does the gaping stay vthe same even when its supercharged