Maybe you guys can help me with my question, infact there's is no maybe about it, i think you guys will help me. Took my car in for mot yesterday, and it failed on emissions, not by much though. Now he did say to me It can't be fuel related as I always use v power shell and the fuel lines are fine, but I do feel a slight mis fire sometimes, now when I got the car in october last year, I just gave an oil and filter change of course using parts from lexus dealers, the guy at the mot station did say to me 1 I need to give the car a good blast on motorway, as I always do start/stop driving and 2 changing the sparkplugs should fix the problem as he noticed a slight misfire. I have bought sparkplugs from the dealers yesterday, they are denso ones, do you guys think this might be a fix? I have sneaky suspicion that the sparkplugs in the car now are not denso, I don't know why, but I just have a suspicion.
It's a mk3 gs300