Took my car in today to have my buddy install my 3.73's. After he installed them he took it for a test drive. When he came back he said that my car has wicked bad spark knock. Asked me what I was running for fuel and I told him reg. 87 and that I was running the SCT X4 87 tune. He told me to go fill it up with 93.
SO, I did. I still had a half tank of 87. Should I be concerned at all??? I have new motorcraft platinum plugs, msd cops, and a bbk 73mm TB/Tube on the way.
Is the SCT causing the spark knock?
Also, he noticed my pcv hosed was collapsed and causing oil to blow all over the passenger side valve cover, so he replaced that.
BTW, he chirped 4th with the new gears on his test drive. Lol. It pulls a lot harder and I noticed my rpms are higher than they were but don't notice much of a difference while cruising. I guess I need to learn how to drive it right.
SO, I did. I still had a half tank of 87. Should I be concerned at all??? I have new motorcraft platinum plugs, msd cops, and a bbk 73mm TB/Tube on the way.
Is the SCT causing the spark knock?
Also, he noticed my pcv hosed was collapsed and causing oil to blow all over the passenger side valve cover, so he replaced that.
BTW, he chirped 4th with the new gears on his test drive. Lol. It pulls a lot harder and I noticed my rpms are higher than they were but don't notice much of a difference while cruising. I guess I need to learn how to drive it right.