So my 2008 Mazda 3 2.0 hit the 75,000 mile mark and i decided to change the plugs. So bought the NGK ILTR5A-13G and switched em out. As soon as i did so the car was hesitant and sputtering while accelerating. I Then put the old ones back on and same thing. The car was running absolutely fine before this. So later on i made sure the new ones were gapped correctly and they measure 0.52. I put those back in and then the car wouldnt start. I have spark and fuel. The car cranks but doesnt start. My next guess is the cam and crank sensors. Any ideas or has anyone experienced similar problems?

 

similar issue... https://www.mazda3club.com/showthrea...light=autolite