Nissan ECU Tuning

zef · Joined: 17 Mar 2008 Posts: 7

Does anybody here know how to convert the hex values found in the fuel and ignition maps to AFR and degrees timing on the CA18DET?

Nunook · Joined: 17 May 2006 Posts: 72

im pretty sure the timing value is the hex value in the map converted to decimal - 15. the Nistune says -22?

if u search i think there's a post talking about the formula to figure out actual injector time.

darkhalf · Posted: Mon May 26, 2008 1:59 pm Post subject:

I'm revising this number with NIStune since I know Nissans idle @ 800rpm / 80 degrees at 15 BDTC and this offset was 22 on the timing map to account for this

However as the idle timing map is used (TPS on) when idle, that is at 15 degrees and I think the main map is about 21 degrees when TPS off. Need to confirm that with CA18 and timing light. The consult reported value seems to match the following offsets I suggested the following on our forum

CONSULT_TIMING_OFFSET=0
IDLE_TIMING_MAP_OFFSET=16
TIMING_MAP_OFFSET=15

http://www.fast-files.com/getfile.aspx?file=14306