hornsfan10609
Certified Mazda Tech
- :
- 2003.5 Mazdaspeed Protege x2
If the plug is at .044 you have to re-gap the plug. I use ZFR6F plugs, the iridiums will work but honestly probably aren't worth the money over the ZFRs, just don't use copper BKRs. If you get the plug without the -11 at the end of the part number it should have a smaller gap.
Stock plug gap is .028"-.032", when I first installed ZFR6F-11s they were gapped at .044" and the car ran like crap and misfired. Fixing all of them to .030" solved the problem.
Stock plug gap is .028"-.032", when I first installed ZFR6F-11s they were gapped at .044" and the car ran like crap and misfired. Fixing all of them to .030" solved the problem.
Last edited: