use NGK spark plugs, the best ones are the PFR6Q
The OEM plugs are iridium and are good for 120k miles, per Toyota. I paid about $16 per from a dealership (which I was happy to do, because its a job I dont want to be doing again in 50k miles).
Pick up some genuine Audi R8 Red-Top coils (not kidding, much lower failure rate) and some fresh NGK Iridium spark plugs.
I had this very same problem where on my 07 V6 the acceleration and power was off. I had replaced my spark plugs with NGK Iridium plugs and after dealing with the horrible performance I decided to change them out for OEM platinum (copper) plugs. This made a huge difference and could immediately tell a night and day difference. Regained the torque and power that was missing.
I've run the NGK ruthenium in my sierra with the 6.2 and they ran great but I notice they aren't the right gap.
You use a **NGK BR2LM.**
I’ve been running NGK Ruthenium for a year now with 0 problems. Supposedly they last longer and are more stable with less dispersion according to NGK. Going to stick with them instead of Iridium or Platinum.
I do NGK 6510 one step colder. I do 0.025”-0.026” gap. I had a shop do my last set since I didn’t trust myself. He accidentally did 0.022” and I put them in and they’ve been fine. The other set is 0.018” and idk if ima put them in. Gotta change the one step colder NGK’s at around 15-20k miles. I usually change mine when I start seeing high spark retard. I’m BT 93/E40 with aux.
I have installed brand new NGK sparkplugs and Bosh ignition coils...but the cylinder 1 misfire does not move or is resolved at all.
Get rid of those ASAP. These are prone to breaking their ground straps. Myself and many many others have fell victim to this.
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