This function is used to modify fuel_crank_pw_vs_ect. The x value is time in seconds, y is the multiplier. This allows across the board ECT range pulsewidth changes without having to enter new pulsewidths.

This is what you would change to reduce the pulsewidth for larger injectors on startup.
For example:
If you are going from 19lb/hr to 36lb/hr injectors:
19/36=.53(rounded up), so change the multiplier to this number.

The smallest pw appears to be 2ms, a lower multiplier will not lower the pulsewidth below 2ms. a Zero however will cut the fuel off completely, which would be useful with large injectors that just wouldn't start at 2ms.

ECT in degrees F, pulsewidth in ms. With this function you can adjust your pulsewidth at startup vs. ECT.