Im doing up another TC definition file and the value I got for conversion factor for converting the raw accel enrich pulsewidth counts in the accel enrich tables to actual time is (table value x 256) x 15.26 &#181secs, which is 3.9 msecs of 'pump shot' for each count of pulsewidth that is stored in the table.

Looks like the values looked up from the tables are stored as the MSB of the temperary async. fuel accumulator and there are 15.26 &#181secs per count. Problem is the other multipliers floating around for converting the AE PW in the TPS and MAP AE tables to actual time are something like 60.1 &#181secs per count. Is there something Im missing? Or are these previous conversion factors wrong?

EDIT: This is relating to the TBI ecms.

 

I tested it out on the bench. Theres around one second of accel enrich when one of the tables is maxed out with 255 so it looks like its 3.9 msec per count of AE in the table.