Noob here...383 sbc/Procharger (D1SC)/FAST (red box) running batch fire off an MSD dist., 15lbs boost@6K. Problem is it seems to be self rev-limiting between 5200 to 5400. I have the fuel cut-off at 6500 and on at 6400. I tried 3 different MSD and Crane Hi-6 boxes. Even tried relocating the coil, all to no avail. Didn't have this problem prior to installing the FAST EFI. Gurus...have at it.
FAST/Ignition problems?
- Thread starter big_G
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- May 28, 2001
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Might that rpm range be about max torque? Data logs made??
I'll try to post the log this weekend.
- Joined
- May 28, 2001
- Messages
- 16,474
Instead of a screen shot, maybe post the tune and log files, so the goorus can download and look??
How do I post the log file here?
Same Aeromotive A1000 pump and boost referenced regulator. Duty cycle when breaking up was 85% to 100%. A/F ratio was in the low to mid 8's for the whole rev limited period...(about 2 seconds).
Way to rich. A/F should be in the 10'S. In The screen shot you posted the a/f was close on the dash but the fast was already pulling 17% as the log goes on it just gets richer until the injectors are at 100%.
What did you have in for a target a/f ? If it was where it needed to be you might just need to take fuel out in the v/e. Might need a fresh set of plugs if it ran very much with race fuel and the a/f in the 8's.
What did you have in for a target a/f ? If it was where it needed to be you might just need to take fuel out in the v/e. Might need a fresh set of plugs if it ran very much with race fuel and the a/f in the 8's.
My target A/F is 12. I have already dropped the boosted V/E table down quite a bit. The plugs look fine. I was thinking the A/F was rich because the engine was rev-limiting, not the other way around. I'll post my V/E table in a few mins.
