Just got my aeroforce interceptor installed this week. Have been having issues where it sputters above 4k rpm's but is perfectly fine in normal driving. Here is my data at WOT:
KR- 4.0
LTFT- 0
I did 6 runs to collect data. If I stay on it until 70ish it throws a code. I scanned for the code and its P0300. I used the misfiring setting to see which cylinders misfired during the 6 runs. None of the runs threw the code because I didnt make them go to 70.
Run 1- Cyl 4 misfire
Run 2- Cyl 2&4
Run 3- Cyl 6
Those were done from 2nd gear into 3rd. The next 3 runs were just done in 2nd due to the law.
Run 1- Cyl 6 misfire
Run 2- Cly 4
Run 3- Cyl 4
What could be causing this problem? I thought it was fuel, but my injector pressure and rail pressure do not move during the sputtering, or at any time really. I just feel like its ignition. However I have brand new ZZP wires and NGK TR6 plugs. The coils came off another car but they were practically brand new when I put them on 2 months ago.
Could it be the coils? Or the module under the coils? Or could it be the plugs? I just changed them and thats when it stared acting up. I had e3 diamond fire plugs in but changed them to NGK because they are colder and e3 are hotter. I want to get opinions before I go spending money to find out if its the plugs. But I dont see how it would be if they are brand new. Could someone please help me better understand this? I will edit information from my gauge when I get more runs in but for now this is what I have. Thanks a lot guys
Originally Posted by thatguy
