Misfire above 4300 rpm's, cel codes
so the other day i went to pass a car i was doing about 55mph and i went to pass i hit the passing gear and hit about 4200 rpms and i started hearing my motor do like a poping sound i wasnt gaining any power or speed so i let off n got back in the lane and my check engine light came on...
the motor is a 2001 300m 3.5ho, in my 99 intrepid "it had a 2.7"
codes are the following;
i do have the intake manifold spacer and ASP crank pulley as well, if it matter...
the car runs and drives great the check engine resets it self the next time i get into the car...
i changed the following;
up graded all grounds 4 & 0 gauge
what should i do next????
when i first did the swap i had no problem hitting 6400 rpms without a issue