07-09-2014, 06:58 PM
Join Date: Jan 2012
Total Cats: 4
So I got the Brain DIYPNP back in today after seeing some lean WOT AFRs using the OEM ECU, but it's running pretty rough. I think there could be an issue with my spark settings after rewiring so I can use the '03 OEM COPS. I searched, but all threads I found focused on dwell times which I adjusted, however I'm confused where to focus my efforts next.
Basic setup is a '03 VVT long block (replaced a '00 long block) in a '96 NA chassis. I am using the intake manifold/TB, cam angle sensor, along with the crank angle sensor and 4 tooth trigger wheel from the '00 motor. Ran pretty well on OEM ECU, except for WOT was too lean for my liking.
- req fuel to 11.8 (for NB2 265cc injectors)
- injector dead time to 0.60
- voltage correction 0.10
- Cranking dwell to 5.0
- Nominal dwell to 3.5
- dropped 4800+ spark 5 degrees for safety margin with added compression
Any ideas past what I've done so far? I've been spending a lot of time searching, but nothing I've found explains why it runs so rough.
Attached basic idle log and current tune. I am more than willing to provide pictures or any other info, just let me know what's needed.
Thanks in advance. Any help greatly appreciated to get my car drivable again.
Last edited by Ian; 07-11-2014 at 11:51 AM.