hello, I have a lq4 with 821 heads and ms4 cam
when I wot fast (from 0% tps to 100%) the car stumbles I noticed that the timing dips down to 5-7 degrees timing, if I can get some pointers on this and car is having a hard time idling in cold weather until the fuel trims kick in. dee2.hpldee with 80.hpt