same here denso fuked me, use the ngks

 

i'm puttin in new spark plugs ... bosch 4 prongs .... where can i find out what size gap to set them set at ? for a 2.8l 30v

 

How did denso screw you guys? I mean, what plugs were you using? Gapped properly?

Mine have been perfect for a while...

 

OK, im not mechanically inclined, but the guys at Auto Zone sold me some type of Densos that they said would be perfect for my car. Ironically, when my friends at my garage were doin my tune up (which included puttin those Densos in) they laughed and told me how shitty they were. Of course, I was like f*ck it, it's fine. Less than a month later, 2nd cylinder misfire. Then ALL of the plugs would fail to spark and just get wet... so then I learned my lesson and went with NGK ultras!

 

Hmm, well I have the top of the line Denso Irridiums... and no problems at all yet... 3000 miles on them. If I notice any issues, they'll be coming out though, and I'll be writing about it. I paid like 68 bucks for 4 plugs. (Canadian)

 

I'd never buy denso's on the fact that i think that they are a rip off. Also the 3 electrode plugs in general im not a huge fan of, with the single electrode you will have 1 steady strong spark. Just changed my bosch's out for the ngks 7e's and the car is running alot better.

 

i had the top of the line denso iridum also and they suk, they were gapped correctly and everything. they were great when my car was stock but when i did the giac k04 upgrade they caused me much trouble, they were misfireing on any boost over 10psi i thought i had a boost leak then i thought it was my mas air, then i thought it was da coil packs.....................in the end it was those shity plugs that were 60 plus dollars