DFI, Batch Fire, and other myths

[Peter Fenske]

Hi All

Gm does many different things..Some ecms like the 165 and the 730
have only one injector driver. Some like the 749 and the 747 have
two drivers. Usually though the injectors are grouped into 2
even if one driver is used..
The pcms 94 up have 8 drivers for sequential..

Also in the code is a pwm timer for synch injection and a asynch timer
for AE injection. so you will see two calculations for fuel.

There are also control bits for selection fire per rev or alternate bank
fire every 2nd rev(tbi)

gl:peter