I have a misfire that I am trying to figure out. It started as an intermittent mild stutter that only occurred in 5/6 gear at low RPMs and mid to high throttle input. At that time I could let off the gas for a moment or down shift and it would go away. Over the course of the last week it has rapidly turned into a misfire that happens in all gears, it feels less severe in 1/2, but will shake the entire car if I throttle up in 4/5/6 above 4k RPM. I just changed the plugs and ignition coils and there was no change. I changed back to the stock map from the cobb stage 1, and it improved slightly, but was definitely still there. The car seems to free rev just fine, and the misfire is worst under the highest engine load (accelerating in high gear low RPM).
I reset the codes right after I changed the plugs and coils and drove around for about an hour tonight and nothing popped up, the check engine light has not been lit through any of this. Any ideas for me? Thanks for any help on this.
I reset the codes right after I changed the plugs and coils and drove around for about an hour tonight and nothing popped up, the check engine light has not been lit through any of this. Any ideas for me? Thanks for any help on this.