Pulse Width

J Ludwig · Post by **J Ludwig** » Wed Jan 18, 2012 3:51 pm

What is the difference between "Base Pulse Width" and "Total Asynchronus Pulse Width"? Is one of them the time the injectors are open?
JL

Post by **robertisaar** » Thu Jan 19, 2012 11:50 am

BPW is the normal pulse width of the injectors that happen synchronously to the engine rotation.

Async pulse width is extra fuel that gets shot in during periods of high D-TPS.

J Ludwig · Post by **J Ludwig** » Sun Jan 22, 2012 8:52 pm

Thanks, Robert.
My goal is to calculate fuel flow and gallons used. My thought is that I could add the async PW and the base PW, factor in the time between reference pulses and come up with a meaningful number. I noticed that when I stab the throttle quickly, the async PW drops to zero, but the base pulse width increases like I expected. I'm using a microcontroller to obtain and display the parameters. I haven't verified this with TunerPro nor have I driven it on the road. I made a short video that I put on YouTube to show those values.
/watchv=tMUVt9_d2jU&list=UUXiWXADYBRZcb6aUclA2QJA&index=1&feature=plcp

JL