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2017 Fist, 18k miles, plugs are about 12k old NGK 1 step colder (pregapped from Mr. Ron), Dizzy tune s2, whoosh intercooler, 2j intake, cobb RMM, currently on stock DV because I am too lazy to swap my Turbosmart EM2 back on. My prior boosted cars (grand national, SRT4) got new plugs every 4000-6000 miles, I don't know off the top of my head what the change interval is on FiST plugs.
I've noticed recently that just normal driving around, I'll look down and see (pretty consistently) -1.25/+3.25 corrections cylinder 4, all the other cylinders are at 0.00/+3.25 or +3.5 (don't remember which). It doesn't matter if I do a hard pull or I just drive around, cylinder 4 always looks about the same. OAR is always fine, flat across the board. Any thoughts? Should I disregard? My daily commute is all surface streets, ~12-14 miles. Car's been behaving fine so I haven't really been looking at the access port, but I noticed that every time I do it's either 0.0.0/+3.25 on cyl 4, or -1.25/+3.25 on cylinder 4. Any thoughts appreciated.
I've noticed recently that just normal driving around, I'll look down and see (pretty consistently) -1.25/+3.25 corrections cylinder 4, all the other cylinders are at 0.00/+3.25 or +3.5 (don't remember which). It doesn't matter if I do a hard pull or I just drive around, cylinder 4 always looks about the same. OAR is always fine, flat across the board. Any thoughts? Should I disregard? My daily commute is all surface streets, ~12-14 miles. Car's been behaving fine so I haven't really been looking at the access port, but I noticed that every time I do it's either 0.0.0/+3.25 on cyl 4, or -1.25/+3.25 on cylinder 4. Any thoughts appreciated.