kev
Probationary Member
- 14
- 0
- May 17, 2018
-
larned,
Kansas
Couple of things on my rebuild.
1. When driving from a stop, my GSX will sometimes bucks and hesitates until about 1500-2000rpms. LC2 wideband shows lean during this time, about 18 to 19. Then goes back to normal.
2. A lot of times, especially when cold, I get 5-10 counts of knock between 3,000-4,000RPMs with part throttle, no matter the gear.. Under WOT boost, no knock whatsoever, in any gear. AFRs during the knock show 13.5-14 with maybe 0 to 5psi of boost (FP big T28).
Are these two conditions related, maybe tune? Vacuum at idle is about 18in.-hg. I don't have any emissions hooked up and nipples are capped.
What can I check?
1. When driving from a stop, my GSX will sometimes bucks and hesitates until about 1500-2000rpms. LC2 wideband shows lean during this time, about 18 to 19. Then goes back to normal.
2. A lot of times, especially when cold, I get 5-10 counts of knock between 3,000-4,000RPMs with part throttle, no matter the gear.. Under WOT boost, no knock whatsoever, in any gear. AFRs during the knock show 13.5-14 with maybe 0 to 5psi of boost (FP big T28).
Are these two conditions related, maybe tune? Vacuum at idle is about 18in.-hg. I don't have any emissions hooked up and nipples are capped.
What can I check?
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