Oppinions on Denzo Irridium spark plugs? (recent Vag-COM showing multiple misfires)

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11-26-2007, 07:58 PM

joeq10

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Oppinions on Denzo Irridium spark plugs? (recent Vag-COM showing multiple misfires)

Background: Upgraded to Denzo Irridium's about 4 months ago and chipped (GIAC/AWE Stage 1) two monhts ago. Post chip -- Car's running fine for first two weeks but then starts to lag and overall poor performance( limited power and very limited torque). About a month after chip added I took it back to AWE and their VAG COM showed overall things seemed OK, but multiple misfires -

Could this be the Denzo plugs? Are they up to the task of running with a GIAC chipped 2.7t? Any thoughts on alternatives? (NGK Irridium?)
Thanks in advance for your thoughts.

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11-27-2007, 02:45 PM

quickaudi:STFA

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one problem that you will find with iridium plugs is that the tip is very, very small.

This, combined with any imperfection in the tip or any installation error will cause the tip to break off. I've seen this happen on multiple 2.7t cars.

If I were you, I'd pull them all and throw them in the trash and put stock plugs back in. The AWE/Giac chip was set up for stock plugs, not iridiums. You could also run the Bosch Platins, which are one range colder, but again, stock is the recommended plug.

FYI, you can find all this info in the archives, such as part numbers, etc.