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Old 12-30-2009, 12:01 AM   #15 (permalink)
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no nickname , it's just a car - '04 volkswagen golf tdi
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hmm yes it is but
i think you are looking for total Open time , the delay itself is only part of the equation as
there is a delay in injector pintle closing as well.

you would need to subtract the delay in closing from the delay in opening and then

use software to subtract that total from total injector pulse width
so the software would know
total injector open time

that is BANK injection , where all injectors squirt at the same time
sequential injection will be similar IN OBD1 systems
ThrottleBodyInjection waveforms are very different

that value is going to be different on different system s and
if you are not accounting for
asynchronous pulse , extra fuel at the pleasure of the ECM
you probably should

Originally Posted by smonson View Post
That's excellent information. So for that Volvo the total delay is around 0.8ms - quite a difference from the Bosch one. That definitely looks like the best way to measure the open/close delay for a given injector.
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