Hey so I know the 5s-fe in the 4th gen came with what I refer to as double prong spark plugs (what are they really called?) and on the side of the valve cover it has a sticker saying not to use the typical single prong plugs commonly found in cars. Well I went to O'Rilleys and bought plugs and found out they were not the double ones that were in the car. The sales guy was telling me apparently they were "trying out a new style of plug" and that it "never took off" and that it wouldn't cause harm to use the single. My friend on the other hand is hell bent that I need to use a double prong because he says I will loose performance and the motor will run poorly. I don't know about all that but I do know 4 years ago my friend had a 99 and we changed her plugs that had 212k on the original with single prong and she ran it for 10k before she ditched her car. Anyway I guess what I want to know is will running the single prong damage my motor or is there any downside to using typical plugs? Also why did the run the doubles? I never remember the 3sfe in my dad's rav4 using them so why the 5?
nhsprintercarib
I don't think the guy at the parts store gave you the right information. You really need to use the double ground electrode spark plugs. I can't explain it in tech terms, but it has something to do with the Gen 4 being a "waste spark" system. From what I understand, if you use the regular single ground electrode, it will not last very long. You need the double ground electrode. I don't think the single ground electrode will cause any damage (I don't know that as a fact), but it will not last as long. Get the doubles.
Interesting video. Thanks for posting that, 97trophy.
Here's a quote from TN member "TouringCamry" in an older thread:
[In a waste spark ignition system] "the spark plug fires twice during each 4 stroke cycle. It fires once from the center to the ground, and once from the ground to the center. Because the electrodes will erode twice as fast, they put twice as many electrodes to make the plugs last as long as plugs in an ignition system that does not use waste spark."
So, do the iridium laser plugs supercede the double ground electrode plugs? The video seems to imply that. I put some doubles in my daughter's Camry recently because that's what the sticker on the car says to do and because of the other thread I read and quoted.
Here's a quote from TN member "TouringCamry" in an older thread:
[In a waste spark ignition system] "the spark plug fires twice during each 4 stroke cycle. It fires once from the center to the ground, and once from the ground to the center. Because the electrodes will erode twice as fast, they put twice as many electrodes to make the plugs last as long as plugs in an ignition system that does not use waste spark."
So, do the iridium laser plugs supercede the double ground electrode plugs? The video seems to imply that. I put some doubles in my daughter's Camry recently because that's what the sticker on the car says to do and because of the other thread I read and quoted.
. I kept the double electrode NGK plug but if memory serves the Denso plugs would have been the original. Should I go with Denso or NGK?I spoke to a customer service rep at Denso a number of years ago with questions about gapping these double electrode plugs. We talked about a few other things and he told me it's not uncommon to see a Toyota V6 engine come off the line with 3 Denso plugs on one bank of cylinders and 3 NGK plugs on the other bank.
Mike
Mike
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