yeah but that car was designed to use the irrids not our tacos and runners. their system is set up for the basic duel electrodes.

 

I gotta add something about the 100K iridium spark plugs. After 100K the spark plugs are pretty well seized in the engine. If you go that route, use anitseize on the threads.

And BTW when I went for the first plug change in my truck the Advanced Auto's computer said my truck took 4 $12 NGK iridium plugs. I bought them and went home to discover that the owner’s manual said it either took a Denso or NGK plug and gave the specific part numbers. I promptly took the iridium’s back and got 4 NGK's for $10. Point is that I think that the auto part store wants you to buy 4 $12 plugs and not 4 for $2.50 of the correct type. I would go with what Toyota calls for.

 

I think Honda now puts iridiums in their motors from the factory. It's probably a higher quality spark plug and not just a gimmick from the autoparts store

 

I am not stating they are a gimmick. You have misunderstood my position. They are OEM on some cars and trucks. My wife's Chevy calls for them and that is what I put in it. But when an Auto parts store sells me the ones for my truck and tells me the manufacture calls for them and in fact it does not makes me suspicious of there intentions. But shame one me for not checking the owner’s manual before going to buy them.

 

they are using them now to satisfy customers. basically saying yeah you wont need a tune up for 100kmiles!!! instead of the usual 30k miles. supposedly saves money. or atleast they want you to think that

 

I've been running single electrode NGK platinums in my 3.4 since the swap last year. I pulled out the old ones and changed in new ones as part of a 40 000 kms tune up. They were running just fine. The whole dual- vs single-electrode hype is just that, hype. You won't get more power out of a dual-electrode plug. It will last a little bit longer because there is a bit more metal to the ground electrode, but I doubt you'd notice any difference.

 

lol, i beg the differ. (or to differ, whatever). when i put 3vze dual diode plugs in my 22RE, it completely stopped pinging, my HCs went down, and i did notice a little more high end power. then again i think thats what clogged my cat and egr... my truck never threw an EGR code until i put those plugs in. or maybe it was just a coincidence. !!!!

 

I've ran Denso Iridiums for 30k miles and they've worked just fine. Were they worth the extra money? Probably not. Next time around I'll just get OEM type plugs, and I'll see if I notice any difference. I probably won't.

 

Or your old plugs gaps were too large. Or they were excessively fouled.

It's entirely possible it's all just a coincidence.

Electricity will always follow the path of least resistance. In a dual electrode plug, it will only jump from the center electrode to the ground electrode with the least crap on it. If one is more fouled than the other it will jump the other way. What it won't do is jump to both at the same time. Unless both electrodes are exactly the same distance and exactly as resistant. Good luck with that.

 

"What it won't do is jump to both at the same time. Unless both electrodes are exactly the same distance and exactly as resistant. Good luck with that."

Well put.